Nutrition & Prostate Cancer · Nutrition & Prostate Cancer Natalie Ledesma, MS, RD, CSO Ida &...
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Your Health Matters Access our patient education library online at www.ucsfhealth.org Physician Referral Service: 888/689-UCSF Nutrition & Prostate Cancer Natalie Ledesma, MS, RD, CSO Ida & Joseph Friend Cancer Resource Center UCSF Helen Diller Family Comprehensive Cancer Center University of California, San Francisco Good nutrition may reduce the incidence of prostate cancer and help reduce the risk of prostate cancer progression. There are many studies currently being conducted that will help to further understand how diet and prostate cancer are related. Current research already shows that improved nutrition reduces risk of heart disease, diabetes, and obesity, and usually improves overall quality of life. Additionally, a healthy diet helps to increase energy levels, facilitate recovery, and enhance the immune system. It is estimated that one-third of cancer deaths in the U.S. can be attributed to diet in adulthood, including diet’s effect on obesity [1]. Scientific evidence suggests that differences in diet and lifestyle may account in large part for the variability of prostate cancer rates in different countries [2]. Patients with early-stage prostate cancer choosing active surveillance might be able to avoid or delay conventional treatment for at least 2 years by making changes in their diet and lifestyle [3]. Guidelines for a Healthy Diet • Plant based diet ➤ Plenty of fruits and vegetables ➤ High fiber – whole grains and beans/legumes • Low fat diet with emphasis on healthy fats • Limit processed and refined grains/flours /sugars • Drink plenty of fluids • Be physically active to help achieve and/or maintain a healthy weight Plant Based Diet A lifelong commitment to a plant based diet may lower a man’s risk of developing prostate cancer and may also affect the progression of the disease. Preliminary evidence indicates dietary and lifestyle changes led to a 4% decrease in PSA and significantly decreased prostate cancer cell growth [4]. PSA increased 6% in the control group. A study assessing the recurrence of prostate cancer * All words with an asterisk (*) are defined in the glossary on pages 43-44
Transcript of Nutrition & Prostate Cancer · Nutrition & Prostate Cancer Natalie Ledesma, MS, RD, CSO Ida &...
Your Health MattersAccess our patient education library online atwww.ucsfhealth.org
Physician Referral Service: 888/689-UCSF
Your Health MattersAccess our patient education library online atwww.ucsfhealth.org
Physician Referral Service: 888/689-UCSF
Nutrition & Prostate CancerNatalie Ledesma, MS, RD, CSO Ida & Joseph Friend Cancer Resource Center UCSF Helen Diller Family Comprehensive Cancer Center University of California, San Francisco
Good nutrition may reduce the incidence of prostate cancer and help reduce the risk of prostate cancer progression. There are many studies currently being conducted that will help to further understand how diet and prostate cancer are related. Current research already shows that improved nutrition reduces risk of heart disease, diabetes, and obesity, and usually improves overall quality of life. Additionally, a healthy diet helps to increase energy levels, facilitate recovery, and enhance the immune system. It is estimated that one-third of cancer deaths in the U.S. can be attributed to diet in adulthood, including diet’s effect on obesity [1]. Scientific evidence suggests that differences in diet and lifestyle may account in large part for the variability of prostate cancer rates in different countries [2]. Patients with early-stage prostate cancer choosing active surveillance might be able to avoid or delay conventional treatment for at least 2 years by making changes in their diet and lifestyle [3].
Guidelines for a Healthy Diet
•Plantbaseddiet
➤ Plenty of fruits and vegetables
➤ High fiber – whole grains and beans/legumes
•Lowfatdietwithemphasisonhealthyfats
•Limitprocessedandrefinedgrains/flours/sugars
•Drinkplentyoffluids
•Bephysicallyactivetohelpachieveand/ormaintainahealthyweight
Plant Based Diet
A lifelong commitment to a plant based diet may lower a man’s risk of developing prostate cancer and may also affect the progression of the disease. Preliminary evidence indicates dietary and lifestyle changes led to a 4% decrease in PSA and significantly decreased prostate cancer cell growth [4]. PSA increased 6% in the control group. A study assessing the recurrence of prostate cancer
* All words with an asterisk (*) are defined in the glossary on pages 43-44
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found that a plant based diet, in combination with stress reduction may significantly slow disease progression [5]. PSA doubling time, the hallmark of recurrent prostate cancer, increased from 11.9 months (prestudy) to 112.3 months (intervention). Additionally, individuals who made comprehensive lifestyle changes improved their quality of life [6].
Fruits and Vegetables
•Containvitamins,minerals,fiber,andvariouscancer-fightingphytonutrients*(examples:carotenoids, lycopene, indoles, flavonols).
•Vibrant,intenseCOLORisoneindicatorofphytonutrient*content.
•Thereisextensiveandconsistentevidencethathighfruitandvegetableintakesareassociatedwith decreased risks of many cancers [4-19], and while results for prostate cancer risk are not yet conclusive, they are promising [4-7, 19-26].
•Menwhoconsumedatleast28servingsofvegetablesperweekhadareducedriskofprostatecancer compared with those who ate fewer than 14 servings per week [21].
•APuertoRicanstudyreportedthatconsuming1-2servingsoffruitdailywasinverselyassociatedwith prostate cancer mortality though consuming more than 2 servings of fruit daily was not associated [24].
•Theriskforprostatecancerwasreducedsignificantlyinmenwhoconsumed70.4oz-105.6oz(50%lowerrisk)andmorethan105.6oz(60%lowerrisk)offruitsandvegetablesperweekcomparedwithmenwhoconsumedlessthan70.4ozperweek[6].
•TherateofPSArisedecreasedsignificantlywiththeadoptionofaplantbaseddiet[19].Menincreasedtheirconsumptionofvegetablesfrom2.8servings/dayatbaselineto5.0and4.8servings/day at 3 and 6 months, respectively.
•WhilevegetableandfruitconsumptionwasnotrelatedtoprostatecancerriskoverallintheProstate,Lung,ColorectalandOvarianCancer(PLCO)ScreeningTrial,theriskofextraprostaticprostatecancer(stageIIIorIVtumors)decreasedby59%withincreasingvegetableintake[25].
➤Thisassociationwasmainlyexplainedbyintakeofcruciferousvegetables.
➤ Additionally, there was some evidence that the risk of aggressive prostate cancer decreased with increasing spinach consumption, but the findings were not consistently statistically significant.
Allium Vegetables
•Manystudiesindicatethatinpopulationsthatconsumehighamountsofalliumvegetablesthereisareducedrateofoverallcancer[20,27-29].
➤ These allium vegetables are rich in flavonoids and organosulfur compounds that have anti-cancer properties.
•AJapanesestudyfoundthatmenwhoconsumed1⁄3oz.ormoreofoneoftheallium-richfoodsmentionedabovehadapproximately50%reductioninprostatecancerriskcomparedwithmenwho consumed lesser amounts[28].
•Onestudyreportedareducedriskofprostatecancerwhensubjectsconsumednaturalgarlicatleast twice weekly [27].
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•Accordingtotheprostatecancerliterature,garlicsupplementsdonotappeartohavethesamebeneficialeffectsasfreshgarlic,eitherraworcooked[30].
• Ingeneral,whatthestudiespointtoisthateatingawholefoods,plant-baseddietisbetterthanrelying on only supplements for optimum risk reduction.
Beta-carotene
•Beta-caroteneisonlyoneofthe600carotenoidsthatcanbepartiallyconvertedintovitaminAinthe body.
•Thebenefitoffruitsandvegetablesinregardstocancerprotectionmayberelatedtohighamountsof carotenoids in certain fruits and vegetables, according to some key population studies [22, 27, 31-37].
•Someresearchindicatesthatdietarybeta-carotenemayreduceprostatecancerifcombinedwithadiet rich in fruits and vegetables, and low in fat [27, 31-33].
➤ A study in Japan found beta-carotene in vegetables to be significantly protective, but the effect was not observed in fruits [33].
➤ Otherstudies,includingacase-control*studyinCanadaanda30-yearfollow-upstudy,observednoassociationbetweenconsumptionofbeta-caroteneandprostatecancer[32,38].
•Plasmacaratenoidswereassociatedwithloweringriskofprostatecancer,butnoassociationwasobserved between cartenoids and disease progression [39].
•Beta-carotenesupplementshavenotbeenshowntohaveanybeneficialpropertiesinregardstoprostate cancer [41-43].
•Furthermore,findingsfromtheATBCTrialrevealeda23%increasedriskofprostatecancerincidenceinmenwhoconsumed20mgbeta-carotenesupplements[44].
Cruciferous Vegetables
•Thereissomeevidencethatcruciferousvegetableshavebeenassociatedwithareducedriskofprostate cancer [21-22, 25, 31, 45-49].
•Menwhoatethreeormoreservingsofcruciferousvegetablesperweekhada41%decreasedriskof prostate cancer compared with men who ate less than one serving per week [21].
•MenwhoconsumedthemostcruciferousvegetablesinthePLCOtrialreducedtheirriskby40%compared with men who ate the least cruciferous vegetables [25].
➤ Men who ate >1 serving per week of broccoli and cauliflower reduced their risk by 35% and 52% compared with men who ate <1 serving per month.
•Inastudywithbroccolisprouts,thephytonutrient*,sulforaphane,blockedcellgrowth[48].
•Ananimalstudyreportedthatbroccolipowderreducedtumorweightby42%,butthecombinationof broccoli and tomato decreased tumor weights by 52% [47].
➤ Tumor growth reductions were associated with reduced proliferation and increased apoptosis*.
•Theanticancerpropertiesofcruciferousvegetablesmaybeduetooneofitscompounds,diindolylmethane(DIM).DIMmayreducetheriskofprostatecancerrecurrence[50].
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•AformulatedDIM(B-DIM)inducedapoptosis*andinhibitedgrowth,angiogenesis*,andinvasionofprostate cancer cells [51].
•Abroccoli-richdietinteractswithagenevariant(glutathione-s-transferacemu1)tolikelylowertheriskofprostatecancer[52].Perhapsthisgenemutationexplainssomeoftheinconsistenciesobserved regarding cruciferous vegetables and prostate cancer.
Lycopene
•Antioxidant*thatscavengesfreeradicalstoreducetissuedamage.Evidencesuggeststhatonedaily serving of tomatoes or tomato products, the richest source of lycopene, helps protect against DNA damage [53].
•Inwesterncountries,tomato-basedproductscomprise85%ofdietarylycopene[54].
•Thirty-twomenwithprostatecancerconsumed30mgdailylycopeneintheformoftomatosaucefor3weeks;researchersreporteda28%reductioninoxidativeDNAdamageanda17.5%decrease in PSA values [55-56].
•Menwhoconsumedtomatosauce2-4timesweeklyhada34%lowerriskforprostatecancerinalarge prospective study [37].
•Similarly,consumingtomatosaucetwoormoretimesperweekdecreasedtheriskofprostatecancer progression [57].
•Tomatosauceconsumption(≥2servings/weekvs.<0.25servings/week)wasassociatedwithareduced risk of total and advanced prostate cancer, although the findings were not statistically significantforadvancedcancer[58].
•TheEuropeanProspectiveInvestigationintoCancerandNutrition(EPIC),however,reportedthatwhilelycopenewasnotassociatedwiththeriskoflocalizedprostatecancer,itwasinverselyassociated with the risk of advanced disease [59].
•Inasmallerstudywheremenconsumed30mgdietarylycopenedailyforthreeweeks,menhad18%lowerPSAlevelswhereasthecontrolgrouphada14%increaseinPSAlevels[60].
•Ninety-fivepercentofthemenwhotooka15mglycopenesupplementdailyachievedPSAstabilization,butnodeclineinPSAwasobserved[61].
➤ Other studies have also observed lycopene supplementation to have no effect on PSA in men with prostate cancer [62, 63].
•Lycopenefromfruitsandvegetablessignificantlyreducedtheriskofprostatecancerinarecentcase-control study [64].
➤ Interestingly, the dual effects of dietary lycopene and green tea had a synergistic effect adding greater protection against prostate cancer.
•Similarly,ananimalstudyreportedthattomatopowderreducedtumorweightby34%,butthecombination of broccoli and tomato decreased tumor weights by 52%; no effect was seen with lycopene supplementation [47].
•Mechanistically,lycopeneactsto:
➤Reducecellproliferationandincreaseapoptosis*[47,60,65-66].
➤ Inhibit IGF-I in normal prostate cells [66].
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•Generally,higherbloodlevelsoflycopenehavebeenassociatedwithareducedriskofprostatecancer[32,67-70].
• Inonestudy,plasmalevelsofcarotenoids,particularlylycopene,lutein/zeaxanthin,andbeta-cryptoxanthinwereinverselyassociatedwithprostatecancerrisk.
➤Subjectsinthehighestquartileofplasmalycopenehada55%lowerriskofprostatecancerthanthoseinthelowestquartile[70].
•Aswithmostnutrientsandnon-nutrients,itisbesttoobtainlycopenefromfoods.Supplementsappeartobecapableofinterferingwithnormalnutritionbypromotingoxidativedamage,whichincreases cancer risk [71].
Nutrient Dietary Sources RecommendationAllium vegetables Garlic, leeks, onions, scallions,
and shallotsInclude these vegetables daily.
Beta-carotene Carrots, sweet potatoes, winter squash, cantaloupe, and mangos
Include these fruits and vegetables daily.
Cruciferous vegetables Arugula,broccoli,Brusselssprouts, cabbage, cauliflower, collard greens, horseradish, kale, kohlrabi, mustard greens, radishes, rutabaga, turnips and turnip greens, and watercress
Include these vegetables daily.
Lycopene Tomato paste (6 ½ tbsp), tomato sauce (3/4 cup), tomato juice(12oz),rawtomatoes(8med), guava (3 ½ cups), and watermelon (4 ¼ cups)
*Note:Amountsin()=30mglycopene
Include30mgdietarylycopenedaily. Cooked tomato products orjuicescontainhigheramountsof lycopene. Lycopene-rich foods are best absorbed in the presence of fat [72].
Pomegranate (Punica granatum; Punicaceae)
•Researchsuggeststhatpomegranateexhibitsstronganti-inflammatoryandantioxidant*effects[73].
•Pomegranateseedoilandfermentedjuiceblockthecancercells’oxygensupply,slowcellgrowth,and promote cell death [74].
•Pomegranateextract,richinellagitannins,caninhibittumor-associatedangiogenesisasoneof several potential mechanisms for slowing the growth of prostate cancer in chemopreventive applications [75].
•Pomegranateextractinhibitsbothandrogen-dependentandandrogen-independentprostatecancercell growth [76].
•Pomegranateextractinhibitednuclearfactor-kappaB(NF-kappaB)activationinandrogenindependent prostate cancer cells [77].
•Animaldatasuggestthatpomegranatefruitextractsignificantlyinhibitstumorgrowthwhilealsosignificantly decreasing PSA levels [73].
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•ProstatecancerpatientssignificantlyincreasedPSAdoublingtime(meanof54monthscomparedto15months)byconsuming8ozpomegranatejuicedaily[78].
•Notethatpomegranateinteractswithsomemedications;pleasediscusswithyourhealthcareprovider if you use pomegranate products regularly.
Organic Produce
•Organicfruitsandvegetableshavefewerpesticides,lowerlevelsoftotalpesticides,andlessoverallpesticidetoxicitythanfruitsandvegetablesgrownwithchemicals.Althoughmoreresearchisneeded,recentevidenceindicatesasignificantincreaseinantioxidants*inorganicandsustainablygrownfoodsversusconventionallygrownfoods[79-83].
➤ Organic vegetables contained a greater concentration of phytonutrients* (phenolic acids) when comparedtoconventionallygrownvegetables[80,81].
•Consumingorganicfoodsappearstoincreasesalicylicacid,whichmaycontributetoalowerriskofcancer[80].
•Choosingorganicproducewillhelpyoureduceyourlevelsofpesticideexposureandwillmostlikely increase your phytonutrient* consumption.
➤ Although washing and peeling your non-organic fruits or vegetables may help to reduce pesticide residues, it will not eliminate them.
•Listedbelowareproducewiththemostandleastpesticidecontamination,bothintermsofnumberof pesticides used and the level of pesticide concentration on an average sampling. Thus, for the fruits and vegetables shown on the most contaminated list, it is wise to buy organic. Alternatively, if organic choices are not available, you may want to consider substituting with produce that tends to contain the least amount of pesticides.
Produce most contaminated by pesticides: Produce least contaminated by pesticides:
Peaches Onions
Apple Avocados
BellPeppers Corn
Celery Pineapple
Nectarines Mango
Strawberries Asparagus
Cherries Peas (sweet)
Kale Kiwi
Lettuce Cabbage
Imported Grapes Eggplant
Carrots Papaya
Pears Watermelon
**AdaptedfromEnvironmentalWorkingGroup–AShopper’sGuidetoPesticidesinProduce
•Itismostimportant,however,toeatfruitsandvegetables–organicorconventional.Iftheavailability or cost of organic produce is a barrier, you may wish to avoid those fruits and vegetables that have the highest pesticide residue content.
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Fiber – A plant-based diet is naturally high in fiber
•Adietrichinnaturalfiberobtainedfromfruits,vegetables,legumes,andwhole-grains(forexample:whole-grain cereals and breads) may reduce cancer risk and reduce the risk of prostate cancer progression.
•Fiberbindstotoxiccompoundsandcarcinogens,whicharethenlatereliminatedfromthebody[84].
•Variousmechanismshavebeenproposedfortheprotectiveeffectsofdietaryfiberagainstcancer.Theseinclude:
➤ Increased fecal bulk and decreased intestinal transit time, which allow less opportunity for fecal mutagenstointeractwiththeintestinalepithelium[85].
➤ Bindingtobileacids,whicharethoughttopromotecellproliferation[86].
➤ Fermentation in the gut, producing short-chain fatty acids (SCFA). SCFA improve the gut environmentandmayprovideimmuneprotectionbeyondthegut[85-86].
➤ Additionally,wholegrainsarerichinantioxidants*,includingtracemineralsandphenoliccompounds,whichhavebeenlinkedtodiseaseprevention[86].
•Ahighfiberdietworkstoreducehormonelevelsthatmaypromoteprostatecancerprogression [85,87-88].
•Someresearchindicatesaninverserelationshipbetweenprostatecanceranddietaryfiberintake[88-89]orfiber-richfoods,suchaswholegrains,legumes,nuts,andseeds[22,31,90-91].
•Onestudyindicatedthatahighfiber,low-fatdietfollowedforonly10daysresultedinserumchangesthatreducedthegrowthofprostatecancer[88].
•Overall,theEPICstudyreportednoassociationbetweendietaryfiberintakeandriskofprostatecancer, although calibrated intakes of total fiber and fruit fiber were associated with nonstatistically significant reductions in risk [92].
•Menwhoatethemostlegumes,ahighfiberplantproteinsource,reducedriskby11%and26%oftotalprostatecancerandnon-localizedorhighgradecancer,respectivelywhencomparedwithmen who ate the lowest amount of legumes [91].
•Atthesametime,aPuertoRicanstudyfoundthatlegumeintakewasnotassociatedwithprostatecancer mortality [24].
•Prostatecancermortalityisinverselyassociatedwithconsumptionofcerealsandnuts/seeds,according to a study in the Journal of the National Cancer Institute [93].
Fruits
Food Serving Size Fiber Grams/ServingApple 1 medium 3.7Banana 1 medium 2.8Blackberries ½ cup 3.8Blueberries ½ cup 1.9Cantaloupe 1 cup 1.3Figs (dried) ¼ cup 6.0
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Grapefruit 1 medium 3.4Grapes 1 cup 1.6Guava 1 medium 4.9Kiwi 1 medium 2.6Orange 1 medium 3.1Pear 1 medium 4.0Persimmon 1 medium 6.0Prunes ¼ cup 3.1
Grains & Other Products:
Food Serving Size Fiber Grams/ServingArtichokes 1 medium 6.9Beets ½ cup cooked 1.7Broccoli ½ cup cooked 2.3Brusselsprouts ½ cup cooked 2.0Carrots ½ cup cooked 2.6Kale ½ cup cooked 1.3Lima beans ½ cup cooked 4.5Peas, green ½ cup cooked 4.4Spinach ½ cup cooked 2.2Squash, winter-type ½ cup cooked 3.4Sweet potatoes (yams) ½ cup cooked 2.7
Vegetables:
Food Serving Size Fiber Grams/ServingArtichokes 1 medium 6.9Beets ½ cup cooked 1.7Broccoli ½ cup cooked 2.3Brusselssprouts ½ cup cooked 2.0Carrots ½ cup cooked 2.6Kale ½ cup cooked 1.3Lima beans ½ cup cooked 4.5Peas, green ½ cup cooked 4.4Spinach ½ cup cooked 2.2Squash, winter-type ½ cup cooked 3.4Sweet potatoes (yams) ½ cup cooked 2.7
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Sugar and other Refined Carbohydrates
•Highsugarfoodsareusuallyhighlyprocessedandrefined,lowinnutrientvalue,andlowindietaryfiber.
•Animalstudiessuggestthatadiethighinrefinedcarbohydratesisassociatedwithincreasedprostate tumor growth [96].
•Furthermore,thesefoodsappeartoincreaseseruminsulin*andseruminsulin-likegrowthfactor(IGF-I)levels,whichleadtoboththedevelopmentandpromotionofcancer[97-105].
•Elevatedfastinglevelsofseruminsulinwithinthenormalrangeappeartobeassociatedwithahigherriskofprostatecancer[106].
•AsserumIGF-Iconcentrationrises,thesubsequentriskforprostatecancerincreases[107].
INSULINHIGHTIDE.Theobservedlinkbetweenobesityandcancermaybeexplainedbythegrowth-promotingactivitiesofinsulinandIGF-1.Onetheorypositsthatexcessweightsetsoffabiochemicalcascadethatincreasesinsulinand,inturn,IGF-1levels.BothhormonesmayactivateIGF-1receptorsoncells,whichcanspurcellgrowthandinhibitcelldeathpathways that usually protect against tumor development.
E.Roell/Source:NatureReviewsCancer,2004
Sugar and other Refined Carbohydrates – Bottom Line
Tohelpcontrolyourinsulinlevel:
•Eatahighfiberdietwithlimitedrefined/processedfoods
•Followalowfatdiet,richinomega-3fattyacids
•Exercise
•Maintainahealthybodyweight
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Low Fat Diet
•Theincreasedcancerriskobservedindevelopedcountriesmaybe,inpart,duetothefactthata high fat diet stimulates increased testosterone levels, which is known to be associated with prostatecancergrowth[108-109].
•Acomprehensivereviewreportedthat20of30studiesfoundpositive,althoughnotallstatisticallysignificant,associationsbetweendietaryfatintakeandprostatecancerrisk[110].
•Whileapositiveassociationbetweenprostatecancerandfatintakewasnotobservedinallstudies[111], some prospective studies did report significant findings [112-116].
•Prostatecancermortalityhasalsobeenassociatedwithdietaryfat[117].Strongcorrelationswere noted for meat, added fats and oils, ice cream, margarine, salad/cooking oil, and vegetable shortening.
•Mostresearchersagreetoaimfor20%orfewerofyourtotalcaloriesfromfat,withlessthan8%oftotalcaloriesfromsaturatedfat[118].
•Thetypeoffatissignificantandmay,infact,beofgreaterimportancethantotalfat.
Saturated Fatty Acids
•Severalstudiesindicateapositiveassociationbetweensaturatedfatintakefrommeatanddairyproducts(animalsources)andprostatecancer[34,119-122].Eatingredmeat[112,115,123-124]and dairy products [34, 112, 123-124] also appear to be related to an increased risk of metastatic prostate cancer.
Trans Fatty Acids
•Transfattyacids,orhydrogenatedoils,areknowntobeatherogenic,increasingone’sriskofheartdisease[125-128].
•Preliminaryresearchindicatesthesefatsmayalsobeassociatedwithincreasedcancerrisk[18,129-130].
•Arecentprostatecancertrialreporteda30%increasedcancerriskinmenwhousedmargarineonceormoredaily[20].
Omega-9 Fatty Acids (Monounsaturated Fats)
•Mostresearchatthistimeindicatesaneutralrelationship[20,111,131-132],oraslightlyprotectiveeffect [133-134] between these fats (and foods that are rich in these fats) and risk of prostate cancer.
•Somestudieshaveshownnuts,generallyconcentratedsourcesofomega-9fattyacids,tohaveaprotective effect against prostate cancer [133].
Essential Fatty Acids (EFA)Essentialfattyacidsarenecessaryfortheformationofhealthycellmembranes,theproperdevelopment and functioning of the brain and nervous system, and for the production of hormone-likesubstancescalledeicosanoids*(thromboxanes,leukotrienes,prostaglandins).Amongotherbodyfunctions, these chemicals regulate immune and inflammatory responses.
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Eicosanoids*formedfromtheomega-6fattyacidshavethepotentialtoincreasebloodpressure,inflammation, platelet aggregation, allergic reactions and cell proliferation. Those formed from the omega-3 fatty acids have opposing affects. Current research suggests that the levels of essential fatty acids and the balance between them may play a critical role in the prevention and treatment of cancer.
Omega-6 Fatty Acids
•Althoughnotallstudies[115,135-137]haveobservedanassociation,ahighintakeofomega-6fatty acids (linoleic acid, which can be converted to arachidonic acid) may stimulate the growth of prostatecancercells[116,131,138-143].
•Whileoverallfatintakewasnotassociatedwithprostatecancer,formenwithafamilyhistoryofprostate cancer, total fat and omega-6 fatty acids increased the risk of prostate cancer by 247% and 261%, respectively, when comparing men in the 4th vs 1st quartile of intake [116].
•Evidencesuggeststhatthebalancebetweenomega-6fattyacidsandomega-3fattyacidscanaffectprostatetumors[140-142].Thus,theratiobetweenomega-6andomega-3fattyacidsmaybeofparamountimportanceandcanbemodulatedbydiet.Itappearsoptimaltoachievea1:1to4:1ratio.
Omega-3 Fatty Acids
•Omega-3fattyacids[(alpha-linolenicacid(ALA),eicosapentaenoicacid(EPA),anddocosahexaenoicacid(DHA)]mayreduceriskforprostatecanceraswellasreducetheriskofcancerprogression[20,132,141-146].
•Mechanismsproposedfortheirprotectiveeffectsinclude:
➤ Induce apoptosis* (cell death)
➤ Suppress cancer cell initiation
➤ Compete with arachidonic acid, which limits harm from arachidonic acid
➤ Anti-inflammatory effects
➤ Strengthen immune function
•Invitroandanimalstudieshaveconsistentlyreportedreducedcellproliferationanddecreasedrateof cancer progression with omega-3 fatty acids [142, 147-149].
•Ananimalstudyfoundthatomega-3fattyacidsreducedprostatetumorgrowth,slowedtumorprogression, and increased survival, whereas omega-6 fatty acids had opposite effects [143].
•Similarly,tumorgrowthrates,finaltumorvolumes,andserumPSAlevelswerereducedintheomega-3 group relative to the omega-6 group (mice) [149].
•Menwhoconsumedfish,aprimarysoruceofomega-3fattyacids,threeormoretimesperweekalso had a 44% lower risk of prostate cancer, especially for metastatic prostate cancer where the effect was even greater [145].
•Similarly,consumingfishtwoormoretimesaweekwasalsoassociatedwithareductioninprostate cancer progression [57].
•ResearchersinNewZealandreportedthatmenwithhighbloodlevelsofEPAandDHA,theomega-3fatsfoundinfish,hada40%lowerriskofprostatecancerthanthosewithlowbloodlevels[144].
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•Whileafishdietwasassociatedwithalowerriskofprostatecancerinthisstudy,ameatdietincreasedtheriskofprostatecancer[150].
•FindingsofaCanadiancohortstudysuggestedthatconsumptionofpreservedfishmayreducetherisk of developing prostate cancer [151].
•A30-yearfollow-upstudyfoundthatmenwhoatenofishhadatwotothreetimeshigherfrequency of prostate cancer than those who ate moderate or high amounts of fish [146].
•Acase-controlstudyfoundthatfrequentconsumptionoffattyfishandmarinefattyacids(onceormore per week) reduced the risk of prostate cancer, and that the association was modified by a genetic variation in the COX-2 gene [152].
•Inanidealenvironment,ALAisconvertedtoEPAandDHA;however,thisprocessisinefficient[153-154]. On the positive side, the conversion process is enhanced by following a diet that is low in saturated fats and low in omega-6 fatty acids [155].
•Althoughnotallstudiesagree[135,156],someresearchindicatesapositiveassociationbetweenALAandprostatecancer[58,115,124,137-138,157].Itshouldbenoted,however,thattheprimarysource of ALA in these studies was red meat, milk, butter, mayonnaise, and margarine [115, 124, 157].
Fat – Bottom Line
•Lessfatisbetter.
•Limitanimalfat.
•Avoidhydrogenatedfats.
•Extra-virginoliveoil,canolaoil,macadamianutoil,avocadooil,oralmondoilispreferredforsaladsand cooking.
•Increaseomega-3fattyacids.
Fatty Acid Dietary Sources RecommendationSaturated fatty acids Meats, poultry skin, baked goods,
and whole milk dairy products, including butter, cheese, and ice cream
Reduce or eliminate meat and whole milk dairy products.
Trans fatty acids Margarine, fried foods, commercial peanut butter, salad dressings and various processed foods including breads, crackers, cereals, and cookies
Avoid trans or hydrogenated fats.
Products may be labeled “trans fat free” if they contain less than 0.5mgperserving.
Omega-9 fatty acids Extra-virginoliveoil,almondoil,canola oil, macadamia nut oil, almonds, and avocados
Include these healthy fats daily
Limit consumption of nutsmto no more than ¼ cup with meal or snack to limit total fat and calories.
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Omega-3fattyacids:EPAandDHA Cold-waterfish(forexample:salmon,
sardines, black cod, trout, herring), breastmilk, and DHA-enriched eggs
Include these healthy fats daily through diet and/or supplements.
It may be wise to consume coldwater fish or fish oil supplements at least twice weekly to obtain an adequate amountofEPAandDHA.
If you choose to use a supplement, opt for one that ishighestinEPAandDHAconcentration.
Avoid swordfish, shark, tilefish, and king mackerel due to high mercury levels.
ALA Flaxseeds,chiaseeds,walnuts,hempseeds, and pumpkin seeds
Omega-6fattyacids:Arachidonic acid Meats, butter, egg yolks, whole milk,
and whole milk dairy productsReduce or eliminate meat and dairy products.
Limit consumption of linoleic acid-rich oils.
Substitute an omega-9 fatty acid-rich oil for your current
cooking oil or fat.
Linoleic acid Common vegetable oils, such as corn oil, safflower oil, sunflower oil, and cottonseed oil, and processed foods made with these oils
Meat
•Ameatdietwasassociatedwithanincreasedriskofprostatecancer[150].
➤ Menwhoconsumed≥5servings/weekofmeathadathree-foldhigherriskofprostatecancercompared with men who ate 1 meat serving/week.
•Menwhoconsumed≥5servings/weekofprocessedmeathadahigherriskofprostatecancercomparedwithmenwhoate≤1servings/week[158].
•Similarly,highconsumptionofredmeats,particularly,cookedprocessedmeats(sausages,bacon,hot dogs) increased prostate cancer risk among black men in a U.S. based cohort study; no association was observed among white men [159].
•Whilenooverallassociationwasfoundbetweenmeatandprostatecancerrisk,welldoneandverywell done meat consumption increased the risk of prostate cancer by 26% and 97%, respectively, whencomparingthehighesttertilewiththelowest[160].
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Dairy
•Multiplestudieshavelinkeddairyconsumptionandprostatecancerrisk[111,158,161-170].Possibleassociationsinclude:
➤ IncreasingintakeofdairyfoodsandcalciumhasbeenpositivelyassociatedwithIGF-I[170-171].
➤ Variousstudieshavereportedincreasedprostatecancerincidencewithhighcalciumintakes[167, 169, 172-174].
➤ Highamountsofcalcium(>2000mgdaily)suppresscirculatingvitaminDbloodlevels[166,169, 173-174, 175].
➤ Dairyprotein:Alargeprospectivetrial,EPIC,reportedthatmenwhoconsumedahighintakeofdairy protein had a 22% increased risk compared with men with the lowest dairy intake [161].
•Itwasestimatedthatanincreaseof35grams/dayofdairyproteinwasassociatedwitha32%increased risk of prostate cancer.
•Calciumfromdairyproductswasalsopositivelyassociatedwithrisk,butnotcalciumfromotherfoods.
➤ It used to be thought that the fat in dairy was a culprit, but several studies have linked low-fat/skim milk to prostate cancer risk [111, 164, 166, 169].
•Dairyproducts,milk,andyogurtsignificantlyincreasedtheriskofprostatecancerwhencomparingthose who consumed the most versus the least; a 63%, 53%, and 52% increased risk, respectively [162].
➤ The more dairy that men consumed, the greater the risk of prostate cancer.
•Menwhoconsumed>2.75servingsofdairy/dayhada12%increasedriskofnonaggressiveprostatecancercomparedwithmenwhoate≤0.98servingsofdairy/day[163].
•Milkconsumptionincreasedtheriskofprostatecancerby13%whencomparingthemenwhodrank the most versus the least amount of milk, a meta-analysis of cohort studies reported [165].
•Menwhoconsumed21servingsofdairyweekly,comparedtomenwhoconsumedfiveorlessweekly, more than doubled their risk of prostate cancer [169].
•Dairyandcalciumwerebothstronglyassociatedwithriskofprostatecancer[167-168].
•Whilenotallstudiesagree[176-177],themajorityofresearchsuggestsanassociationbetweendairy foods/calcium and the risk of prostate cancer.
Calcium
•Severalstudiessuggestanassociationbetweenhighcalciumintakesandanincreasedriskofprostatecancer[58,111,163,166-168,172-174,178].
➤ Oneanalysisidentifiedafour-tofive-foldriskelevationwithveryhighcalcium(>2000mgdaily)orverylowcalciumintakes(<500mgdaily)[173].
➤ Calciumintakeof>2,000mg/daywasassociatedwitha34%increasedriskofnonaggressiveprostatecancercomparedwithmenwhoconsumed<1,000mg/dayofcalcium[163].
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➤ Menwhoconsumed1329-2250mgofcalcium/dayhada39%greaterriskofprostatecancercomparedtomenwhoconsumed228-802mgcalcium/day[167].
➤ MenintheATBCCancerPreventionStudy,acohortofsmokers,whoconsumed≥2,000mg/dayofcalciumhada63%increasedriskcomparedwithmenwhohad<1,000mg/dayofcalciumintake[178].
➤ Findings from a prospective cohort of health professionals suggest that calcium intakes exceeding1,500mg/daymaybeassociatedwithadecreaseindifferentiationinprostatecancer (higher Gleason score) and ultimately with a higher risk of advanced and fatal prostate cancer but not with well-differentiated, organ-confined cancers [174].
➤ Similarly,highercalciumintakesresultedinamodest7%increasedriskoflocalizedprostatecancer,butmorethan200%increasedriskforadvancedprostatecancercomparedtomenwith the lowest calcium intake [172].
➤ Calciumintakeincreasedtheriskoffatalprostatecancer[58].
➤ Alternatively, in the NIH-AARP Diet and Health Study, total and supplemental calcium were unrelated to total and nonadvanced prostate cancer, but calcium intake was weakly associated with advanced and fatal prostate cancer [179].
•Skimmilk(≥2vs.0servings/day),inparticular,significantlyincreasedriskofadvancedprostatecancer by 23%.
•Incontrast,calciumfromnondairyfoodswasassociatedwithalowerriskofnon-advancedprostate cancer.
•Overall,itisrecommendedtoobtainadequateamountsofcalciuminthediet,buttoavoidhighcalciumintakes(morethan1200mgdaily).
Food Category Summary RecommendationFruits and vegetables Oneserving=
½ cup fruit or vegetable 1 cup raw leafy greens ¼ cup dried fruit or vegetable 6ozfruitorvegetablejuice
Eat1cupormorevegetableswithlunch and dinner
Atleast5,preferably8-10totalservingsdaily[180]
5 or more vegetable servings
3 fruit servings
Fiber First ingredient on the label should be whole or sprouted grain flour, not white flour, unbleached white flour, or enriched wheat flour
Choose breads with 3 or more grams of fiber per slice
Wholegrainsinclude,amongothers,oats, barley, brown rice, quinoa, amaranth, bulgur, millet, buckwheat, spelt, wild rice, and teff.
30-45gramsdaily[118]
This goal can be achieved by meeting your fruit and vegetable goal plus one serving of legumes or at least two servings of whole grains.
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Refined carbohydrates and sugars
Dietary sources include products madewithrefinedflours(forexample:white bread, white rice, white pasta) or refined grains, alcohol, sodas, drinks containing added sugars, and desserts, such as candy, cookies, cakes, and pastries.
Limit or avoid consumption.
Meat Dietary sources include beef, pork, and lamb.
Reduce or eliminate meat consumption.
Avoid processed, grilled or fried meats.
Dairy Dietary sources include milk, cheese, yogurt, ice cream, and butter.
Reduce or eliminate dairy consumption.
Genotoxins: Heterocyclic Amines (HCA’s) & Polycyclic Aromatic Hydrocarbons (PAH’s)
•Naturalcomponentsinmeat,suchasaminoacids,creatine*,andpolysaccharideprecursors,are converted to HCA’s during high-temperature cooking. HCA’s are known to cause cancer in laboratoryanimals[181-184].Whilehumanresearchisforthcoming[160,181,185-190],onlyonestudy has observed no association between HCA’s and prostate cancer [191].
•Itmaybethatcancerriskisheightenedinpeoplewhometabolizethesecompoundsmorerapidly.Someindividualsappeartohavegenesthatencodeenzymeproduction,whichreadilymetabolizeHCA’s[185,192].
•ThetypeofproteincookedcanalsoaffecttheconcentrationofHCA’s.Ithasbeenreported,forexample,thatchickenhasmorethan100timesthenumberofHCA’sthansalmon[192].Londonbroiledsteakhadmorethan600timestheamountofHCA’swhencomparedtosalmon.
•Afteradjustingforageatprostatectomyandrace,grilledmeatconsumptionwassignificantlyassociated with higher PhIP levels, a type of HCA, in tumor cells, but this association seemed to be primarily due to consumption of grilled red meats as opposed to grilled white meat consumption [189].
➤ Grilled hamburger consumption had the most significant association with PhIP levels in tumor cells.
•TheseresultsareconsistentwithapositiveassociationbetweenPhIPintakeandhighlyelevatedPSA,supportingthehypothesisthatdietaryinterventionmayhelpreduceprostatecancerrisk[190].
➤ However, in this study, PhIP intake was attributable mostly to chicken (61%) and positively associated with saturated fat intake.
•CarcinogenicactivityofHCA’sisaffectedbyvariousdietaryfactors[192]:
➤ Factorsthatenhancecarcinogenesis*whencombinedwithHCA’sinclude:
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■ High-fat diet
■ Caffeine
➤ Factorsthatinhibitcarcinogenesis*whencombinedwithHCA’sinclude:
■ DHA
■ Conjugatedlinoleicacid(CLA)
■ Isoflavones
■ Green tea catechins*
■ Indole-3 carbinol
■ Probiotics
■ Gamma-tocopherol
•ThemostimportantvariablescontributingtotheformationofHCA’sare[181,193]:
➤ Cookingtemperature(greaterthan300°F).
➤ Cooking time (greater than 2 minutes).
➤ Cooking method (frying, oven grilling/broiling, barbecuing).
•Charringoffood(charcoal-broiledorsmokedfoods)contributetoPAH’s[194].
•Meatcanpotentiallybemade“safer”toeatbybeingcookedinawaythatdoesnotleadtotheformation of these compounds.
➤ Choose lean, well-trimmed meats to grill. Lean cuts cause less fat to drip onto the coals (and hence, fewer flame-ups).
➤ Using marinades significantly reduces the amount of HCA’s.
➤ Briefmicrowavepreheatingofrawmeat,forexample,substantiallyreducestheHCAcontent.
➤ Small portions require less time on the grill.
•GrillvegetablesormeatsubstitutesthatdonotleadtotheformationofHCA’sorPAH’s.
Alcohol
•Whilepreviousstudies[195]havereportednoassociationbetweenalcoholandprostatecancer,arecent meta-analysis found evidence that prostate cancer was indeed linked to heavier alcohol use [196].
Adequate Fluids
•Thefunctionsofwaterinthebodyincludethefollowing:
➤ Carries nutrients and waste products.
➤ Participates in chemical reactions.
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➤ Actsasalubricantandcushionaroundjoints.
➤ Acts as a shock absorber in the eyes and spinal cord.
➤ Aids in the body’s temperature regulation.
➤ Maintains blood volume.
•Increasedfluidintakeisneededforahighfiberdiet.
•Drinkplentyofwaterdailytohelpmeetfluidneeds.
Caloric Intake
•Substantialevidenceindicatesthatahighcaloricintakeincreasesone’sriskofvariouscancers,includingprostatecancer[23,121,156,172,197-198]andfatalprostatecancer[58,199].
•Acase-control*studyreporteda115%increasedriskinlocalprostatecanceranda96%increasedrisk in regional/distant prostate cancer for those consuming higher calorie diets (2,439 or more calories/day) compared with individuals consuming a lower calorie diet (less than 1,322 calories/day) [172].
•Inaseparatestudy,researchersreportedanearlyfour-foldincreaseinprostatecancerriskinmen who consumed the most calories (more than 2,624 calories/day) compared with men who consumedtheleastcalories(1,064calories/day)[198].
•Anearlierstudyfoundthatcaloricintakewaspositivelyassociatedwithpreclinicalprostatecancerrisk; as caloric intake increased, cancer risk rose significantly [121]. The greatest risk was for men who consumed more than 3,475 calories/day.
•ThemechanisminvolvedmayberelatedtothedecreaseinIGF-Iobservedwhencaloricintakeisrestricted[121,200].
•DietaryrestrictionreducedserumconcentrationsofIGF-Iby35%inrats,whichcontributestoreducedVEGFexpressionandinhibitedtumorangiogenesisassociatedwithprostatetumorigenesis[199].
Body Mass
•Higherbodymassandphysicalinactivitymaycontributetoprostatecancerrisk.
➤ Alargeprospectivestudyobservedasignificantpositiveassociationbetweenbodymassindex(BMI)1 and prostate cancer risk [111].
➤ Acohort*studyreportedobesementohavea20%increasedriskofdyingfromprostatecancerandthosemenwhowereseverelyobesehada34%elevatedrisk[201].
➤ HigherBMIwasassociatedwithagreaterpercentoftheprostateinvolvedwithcancer,increasedtumorvolume,andhigh-gradedisease[202].
■ MenwithaBMI>/=35hadnearly40%largermeantumorvolumesthannormalweightmen.
1 BMIiscalculatedbyweightwt(kg)/ht2(m2)
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➤ This research was further supported by recent evidence that obesity is a risk factor for aggressiveprostatecancer[202-205].
➤ Interestingly,findingsfromtheEPICstudysuggestthatabdominaladipositymaybeassociatedwith an increased risk of advanced prostate cancer, but that this association may be stronger amongindividualswithalowerBMI[206].
➤ Theriskofprostatecancermaybereducedwithweightloss[205].
•AccordingtoaUCSFstudywithover2,000men,menwhomaintainedahealthybodyweightwerelesslikelytohavearecurrence[207].
➤ Obesemenhada30%increasedriskofcancerrecurrence,comparedwiththosewithlowerbodyweights.Veryobesepatients(BMI>35)heightenedtheirriskofrecurrenceby69%.
Physical Activity
•TheHUNTstudyreportedthatrecreationalphysicalexerciseisassociatedwithareducedriskofadvanced prostate cancer and prostate cancer death though not associated with overall prostate cancer[208].
➤ Aprospectivestudysuggestedthatmeninthehighestcategoryofexercisereducedtheirriskofadvancedprostatecancerby36%comparedtothenon-exercisers[208].Theriskofdyingfrom prostate cancer was reduced by 33%.
•WhilelifetimephysicalactivitywasnotlinkedwithprostatecancerinaSwedishstudy[209],strenuousphysicalactivitybymenintheirearly50swasassociatedwithreducedrisk[210].
•Menwhoexercisedmostvigorously(≥3hours/week)hadareducedriskofadvancedandfatalprostatecancer[58]thoughastudyofPuertoRicanmendidnotshowasignificantassociationbetween physical activity and prostate cancer mortality [211].
•Vigorousexercisewasnotassociatedwithtotal,advanced,orfatalprostatecancerintheNIH-AARP Diet and Health Study [212].
➤ However, the authors did report a small 3% reduction in total prostate cancer in those men whodidfrequentexerciseduringadolescence.
•Researchersconductedan11-daystudywheremenfollowedthePritikinprogram[88].ThePritikinprogram focuses on a diet that is high in vegetables, fruits, whole grains, and very low in fat in combinationwith60minutesofdailyexercise.
➤ SerumIGF-Idecreasedby20%afterfollowingtheprogramfor11days.ThisreductioninIGF-Imay be related to the lower serum insulin* levels observed via a healthy low fat plant-based dietandregularexercise.
•Thesefindingswerefurthersubstantiatedbyresearcherswhoplacedbloodserumsofthreegroupsofmen(Pritikinfollowersof14years,regularexercisersof14yearswithnomodifieddiet,andsedentary overweight men who consumed a high-fat, high-sugar diet) in culture dishes containing prostatecancercells[98].
➤ In a mere three days, researchers reported significant change in the cells. The blood serum of thePritikinfollowersdestroyed50%oftheprostatecancercellscomparedtotheexercise-onlygroupwhereapproximately25%ofthecellsweredestroyedandlessthan3%ofthecancercellswere destroyed in the overweight, sedentary men eating a more typical high-fat American diet.
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•Studiesshowpromisingeffectsofphysicalactivityonmuscularfitness,physicalfunctioning,fatigue, and health-related quality of life [213].
•TheRENEWstudyreportedthatforolderlong-termprostatecancersurvivors,adietandexerciseintervention reduced the rate of self-reported functional decline compared with no intervention [214].
•A12-weekhome-basedphysicalactivityinterventionmayprovidehealthandqualityoflifebenefitsfor prostate cancer patients undergoing hormone therapy [215].
•Healthyweightcontrolisencouragedwithanemphasisonexercisetopreserveorincreaseleanmuscle mass.
Foods and Nutrients of Special Interest to Prostate Cancer Survivors
Antioxidants* – Found in abundance in fruits and vegetables
•Preventoxidativedamageinbodycells.
➤ Researchindicatesalinkbetweenoxidantdamageandprostatecarcinogenesis.
•Examplesofantioxidant*nutrientsandnon-nutrientsincludevitaminsA,C,andE,selenium,lycopene, and beta-carotene.
•NotethatpatientsmaybeadvisedtoNOTconsumehighdoseantioxidant*supplementsduringchemotherapyorradiationtreatments.Antioxidant*consumptionviafoodsourcesandabasicmultivitamin are very safe.
Selenium
•Antioxidant*,whichscavengesfreeradicalsandsuppressesdamageduetooxidationinthetissues.Also is essential for the immune system.
•Therehavebeenmixedfindingsregardingtheassociationofseleniumandprostatecancer.
•NoassociationwasobservedbetweenseleniumsupplementationandprostatecancerriskintheVITamins And Lifestyle(VITAL)study[216].
•Arecentstudysuggestedthattheeffectofseleniumontheriskofprostatecancermaywellbeaffectedbythemanganesesuperoxidedismutase(SOD2)gene[217].
➤ Higher selenium levels were associated with a reduced risk of presenting with aggressive disease in men with the AA genotype, whereas higher selenium levels were associated with an increasedriskofaggressivediseaseinmenwithaVallele.
•PreviousresearchhadsuggestedapossiblesynergisticeffectbetweenseleniumandvitaminEinreducingtheriskofprostatecancer[218]yetsupplementationof200mcg/dayofseleniumhadnoeffectontheriskofprostatecancerinrelativelyhealthymenfromtheSeleniumandVitaminEChemopreventionTrial(SELECT)[219].
•Otherstudies,however,havefoundseleniumtohaveaprotectiveeffectagainstprostatecancer[173,220-223],inhibitangiogenesis*[224]andinduceapoptosis*orcelldeath[225].
•Alargecohortstudyreportedthatserumseleniumwasnotassociatedwithprostatecancerriskoverall, however, higher serum selenium was associated with lower risks in men reporting a high vitaminE(>28.0IU/day)intakeandinmultivitaminusers[226].
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➤ Furthermore, high serum selenium concentrations were related to a reduced risk of prostate cancer among smokers.
•Lowplasmaseleniumhasbeenassociatedwitha4to5-foldincreasedriskofprostatecancer[227].
•Whilenooverallassociationbetweenseleniumandprostatecancerwasobserved,African-American men in the highest tertile of selenium levels had a 41% lower risk of prostate cancer whencomparedwithmeninthefirsttertile[228].
• Inonetrial,theuseofseleniumsupplementsreducedtheriskofprostatecancerrecurrenceby63%[220].
•AlthoughtheEPICtrialobservednoassociationbetweenplasmaseleniumconcentrationsandtherisk of prostate cancer [229], it has been argued that the selenium concentrations did not reach the levelneededtomaximizeplasmaglutathioneperoxidaseactivity,whichmayhaveprecludedanobservedeffect[230-231].
•Seleniumisaprecursortotheglutathione*(GSH)antioxidant*system.GSHistheprincipalprotective mechanism of the cell and is a crucial factor in the development of the immune response by the immune cells [232].
•Mostresearchstudieshaveuseda200mcgsupplementdaily[225,233].
➤ Selenomethionine is a type of selenium supplement that appears to have greater bioavailability than other forms [234-235].
➤ Ifyou’resupplementingwith>70mcg/day,youmaywishtoconsiderhavingyourserumseleniumlevelcheckedtoensurethatyou’renotconsumingseleniuminexcess.
Nutrient Recommended Dietary Allowance (RDA)
Prostate Cancer Research
Tolerable Upper Intake Level (UL)
Selenium 70mcg 200mcg 400mcg
Vitamin C
•MaypreventtheformationoffreeradicalsthatcauseDNAdamageandhelprepairdamagedDNA.
•NoconsistentrelationshipbetweenvitaminCandprostatecancer.Somestudiesreportslightreductionsinrisk[23,124,236-238]whileothershavefoundnoeffect[38].
➤ Case-control* studies in Spain [124] and Uruguay [23] that used food frequency questionnaires reported an inverse association of vitamin C and prostate cancer.
➤ An additional case-control* study reported a 23% reduction in prostate cancer risk from daily vitamin C use [236].
➤ An in-vitro study observed a protective effect of vitamin C against prostate cancer [237].
■ Inhibits proliferation and survival of tumor cells.
➤ A large cohort* study, however, found no protective effect for vitamin C against prostate cancer [41]anda30-yearfollowupstudyobservednoassociationbetweenconsumptionofvitaminCandprostatecancer[38].
•Someevidencesuggestshigherdosages(morethan1000mgdaily)mayactuallypromoteoxidative
22
damage. There are, however, other studies that have not observed adverse effects with vitamin C supplementation.
Nutrient Recommended Dietary Allowance (RDA)
Prostate Cancer Research
Tolerable Upper Intake Level (UL)
VitaminC 90mg(males) NA 2000mg
Vitamin D
•VitaminDisknowntoinhibitprostatecancerinanimals[239-243]andhumanresearchisrapidlygainingground[173,244-246].VitaminDisbelievedtobeimportantintheprotectionofhumanprostate cells [246-249].
•Nonetheless,findingsfromameta-analysisofobservationalstudiesreportednoassociationbetween vitamin D intake and prostate cancer risk [177].
•Early-lifeexposuretosunlight,aprimarysourceofvitaminD,mayberelatedtotheriskofprostatecancer[250].
➤ Men who were born in a region of high solar radiation had a significantly lower risk of prostate cancer with a slightly greater reduction for fatal than for nonfatal prostate cancer.
➤ Frequentrecreationalsunexposureinadulthoodwasassociatedwithasignificantlyreducedrisk of fatal prostate cancer.
•Epidemiological*studiesindicatethatsunlightexposureisinverselyproportionaltoprostatecancermortality and that prostate cancer risk is greater in men with lower levels of vitamin D [244-245, 247, 251-252].
•Increasingserum25(OH)-vitaminDlevelsisinverselyassociatedwithall-causemortality[253-254].
•A25nmol/Lincreasewasassociatedwitha17%reductionintotalcancerincidentsanda29%decrease in total cancer mortality [253].
•Nostatisticallysignificanttrendinoverallprostatecancerriskwasobservedwithincreasingseason-standardizedserum25(OH)Dlevels[255-257].
➤ However, serum 25(OH)D concentrations greater than the lowest quintile were associated with increased risk of aggressive disease [255].
•Serum25(OH)Datmedium(20-32ng/mL)orhigh(>32ng/mL)levelsweresignificantlyrelatedtobetterprognosiscomparedwiththelowlevel[258].
➤ This relationship was stronger for patients receiving hormone therapy.
•Itisestimatedthatthereisa30to50%reductioninriskfordevelopingprostatecancerbyeitherincreasingvitaminDintaketoleast1000IU/dvitaminDorincreasingsunexposuretoraisebloodlevelsof25(OH)D>30ng/ml[259].
•AstudyonadvancedprostatecancerreportedthatthecombinationofvitaminDandthechemotherapyagenttaxoterewastwiceaseffectiveastaxoterealonebasedonPSAresponses[260].
•Researchhasfoundthataman’sgenotypeand25(OH)Dstatusaffectone’ssusceptibilitytoprostate cancer [261-262].
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•VitaminDabsorptiondeclineswithage,andvitaminDdeficiencyisnotuncommonamongolderadults [263-267].
•Patients,especiallythoseonhormonetherapy,maybenefitfromaserumvitaminDbloodtest (25-OH)andadualenergyx-rayabsorptiometry(DEXA)bonedensityscan.
•Optimalserum25-OHvitaminDlevelshavenotbeendefinedthoughresearchindicates90-100nmol/L(36-40ng/mL)maybetheminimum[268].
• IfsupplementingwithvitaminD,itiswisetotestserumvitaminD.Althoughunlikely,excessivedosesofvitaminDcanbetoxicandcausehighbloodlevelsofcalcium.
Nutrient Adequate Intake (AI) Prostate Cancer Research
Tolerable Upper Intake Level (UL)
VitaminD Under50yrs:5mcgor200IU
50-70yrs:10mcgor400IU
Over70yrs:15mcgor600IU
AI 50mcgor2000IU
Calcium 19-50yrs:1000mg
Over50yrs:1200mg
AI 2500mg
Vitamin E
•VitaminEactsasacellularantioxidant*andananti-proliferatingagent.Itconsistsofbothtocopherols and tocotrienols.
•Whilestudiesaremixed,somesuggestthatvitaminEmayreducetheriskofprostatecancerandinhibit prostate cancer cell growth [23, 44, 269-271].
➤ Cancer incidence reduced by 33% and death from prostate cancer reduced 41% in a 6-year follow-upstudywheremenconsumed50-100IUvitaminEdaily[44].
•AnItaliancase-controlstudyreportedasignificantinverseassociationbetweenvitaminEandprostatecancer[238].
•Nonetheless,supplementationof400IU/dayofsyntheticvitaminE(dl-alphatocopherol)wasnotassociatedwithareducedriskofprostatecancerinrelativelyhealthymenfromtheSELECTstudy[219].
•WhilesupplementalsyntheticvitaminEwasnotassociatedwithareducedprostatecancerriskoverallintheVITALtrial,theriskforadvancedprostatecancerdecreasedsignificantlywithgreaterintakeofsupplementalvitaminE(≥400IU/day)[216].
•Resultssuggestthatlong-termvitaminE(alpha-tocopherol)supplementationdecreasesserumandrogen concentrations, which is related to a reduced incidence of and mortality from prostate cancer [222].
•Higheralpha-tocopherolconcentrationsappearedtoincreaseprostatecancersurvivalinaFinnishstudy[40].
•Researchersreportedlowerserumgamma-tocopherol(aformofvitaminE)valuesinmenwithprostatecancerinarecentcohortstudy[270].Furthermore,largedosesofalpha-tocopherolsuppress levels of gamma-tocopherol [272-274].
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•Themostprovocativestudyfoundthatmenwiththehighestplasmagamma-tocopherolconcentrations had a significantly fivefold lower risk of prostate cancer compared with men in the lowest quintile [269]. This effect was not significant for plasma alpha-tocopherol concentrations.
•Otherresearchershavealsofoundgamma-tocopheroltoofferaprotectiveeffectagainstprostatecancer[270-272,275].
•Manystudiesuseda400IUvitaminEsupplementdaily,however,amulti-vitaminmayeasilyprovide50-100IUvitaminE.
•TherehasbeenconsiderablediscussionregardingthedifferentformsofvitaminE.
➤ NaturalformsofvitaminE(gamma-tocopherol,d-alpha-tocopherol)appeartobebetterabsorbedbythebody,butaremoreexpensive[276-277].Asupplementcontainingmixedtocopherols (d-alpha, gamma, beta) and tocotrienols is preferred. The combination of gamma- and alpha-tocopherol may offer greater protection from DNA damage than alpha-tocopherol alone[278].
➤ ManyofthestudiesonvitaminEandprostatecancerhaveusedsyntheticformsofvitaminE(dl-alpha-tocopherol)[44,216,219,222,276,279].Arecentstudy,however,reportedthatthenaturalformofvitaminEwasmoreeffectiveinthesuppressionofprostatecancer,andatalowerconcentration[276].Morespecifically,vitaminEsuccinatemayoffertheseprotectiveeffects[280].
Nutrient Recommended Dietary Allowance (RDA)
Prostate Cancer Research
Tolerable Upper Intake Level (UL)
VitaminE 15 mg
33 IU dl-alpha (synthetic)
22 IU d-alpha (natural)
50-200IU* 1000mg
2222 IU dl-alpha
1493 IU d-alpha
*VitaminEformvariesamongstudies
Nutrient Summary ReccommendationSelenium DietarysourcesincludeBrazilnuts,
seafood, enriched brewer’s yeast, and grains.
Selenium content depends somewhat on the amount of selenium in the soil in which the products are grown.
70mcgdailythroughdietand/oramultivitamin
TwoBrazilnutsprovide200mcgselenium.
VitaminC Dietary sources include various fruits and vegetables, including papaya, citrus fruits, kiwi, cantaloupe, mango, strawberries, bell peppers, broccoli, and tomatoes.
>90mgdaily
Include these fruits and vegetables daily.
Supplementscontaining250-500mgtaken 1-2 times daily appear safe.
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VitaminD A fat-soluble vitamin that we generate through skin synthesis of sunlight (ultraviolet rays).
Dietary sources include cold-water fish, eggs, and fortified products, such as milk, soy milk, and cereals.
400-2000IUdaily*
Maintainserum25(OH)-vitaminD>40ng/mL.
The bioavailability of vitamin D3 (cholecalciferol) is much greater than vitamin D2 (ergocalciferol).
VitaminE Dietary sources include vegetable oils, wheat germ, sweet potatoes, nuts, seeds, and avocados.
EatvitaminE-richfoodsregularly.
* It may be necessary to use higher dosages of vitamin D; your serum level is used to determine the proper supplemental dosage
Multivitamins
•Noassociationwasobservedbetweenmultivitaminuseandriskoflocalizedprostatecancer,butan increased risk of advanced and fatal prostate cancers was observed among men reporting excessiveuseofmultivitamins(morethanseventimesperweek)whencomparedwithneverusers[281].
➤ This association was strongest in men with a family history of prostate cancer or who took individualmicronutrientsupplements,includingselenium,beta-carotene,orzinc.
Flaxseed
•Flaxmayworktoblocktumorgrowth,inhibitangiogenesis*,andenhanceimmunefunction[282].
•Lignans*,phytoestrogensfoundinflax,appeartobindwithtestosterone,whichlowercirculatinglevelsoftestosterone[283-284].Thisactionmaybeoneoftheprotectivemechanismsofflax.
•Preliminarydatasuggestreducedtumorgrowthandspreadwiththeuseofflaxseed[283,285-286].
•Animaldataindicatesthatflaxseedmayleadtolessaggressivetumorsandalowerriskofmetastasis[285].
•Apilottrialreportedthatprostatecancerpatientsfollowinga20%fatdietandconsuming30gmflaxdaily(2½tbsp)resultedinreducedcancergrowthratesthemoredayspatientsfollowedtheabove diet [276].
•Flaxseedsupplementation(30gmdaily)significantlyreducedprostatecancerproliferationratesinmenpresurgery[287].
➤ Noeffectwasobservedinmenwhoconsumedalowfatdiet(20%oftotalcalories)only.
Green Tea
•Greenteacontainsphytonutrients*knownaspolyphenols(flavonoids)thatprovideantioxidant*,antidiabetic,anti-inflammatory,antibacterial,andanticancerproperties[64,288].
➤ Mayblocktheformationofcancer-causingcompounds,suchasnitrosamines*[289]
➤ PreventsDNAdamage[290]
➤ May inhibit tumor growth and induce apoptosis* [291-292]
26
➤ Inhibits COX-2 activity [294]
➤ Inhibits IGF-I [295]
➤ Increases immune response [292]
➤ Many studies indicate a lower risk of cancer with green tea consumption, but more research is needed for conclusive evidence [296-299].
•Greenteacatechins*,acategoryofpolyphenols*,suppresscellgrowthandinducecelldeathinhumanprostatecancercells[297,300-303].
•Animalstudieshaveobservedinhibitionofprostatecancerdevelopment,lowerserumtestosteroneconcentrations,andincreasedsurvivalwithgreentea[304].
•Epigallocatechin-3-gallate(EGCG),themostabundantgreenteacatechin,hasbeenshowntosuppressprostatetumorgrowthandangiogenesiswhilepromotingcancercelldeathinmice[305].
➤ Additionally,EGCGwascorrelatedwithadecreasedserumPSAlevel.
•Researchersfoundgreentea(6gmdaily)tohavenosignificanteffectonPSAlevels[165,201].Themedian length of the study, however, was only one month.
•ThecombinationofsoyandgreenteasynergisticallyinhibitedtumorweightandmetastasisandsignificantlyreducedserumconcentrationsofbothtestosteroneandDHT[307].
•Similarly,whilegreenteaalonesignificantlyreducedtheriskofprostatecancerinarecentcase-control study, the dual effects of green tea and dietary lycopene had a synergistic effect adding greater protection against prostate cancer [64].
•IntheJapanPublicHealthCenter-basedProspectiveStudy,greenteawasnotassociatedwithlocalizedprostatecancer,butdidappeartosignificantlyreducetheriskofadvancedprostatecancerby48%inmenwhodrank5cups/daycomparedwithmenwhodranklessthan1cup/day[308].
•Nonetheless,theOhsakiCohort*studyreportednoassociationbetweengreenteaandtheriskofprostatecancer[309].
•Acase-controlstudyobservedheightenedprotectiveeffectsofgreenteawithincreasingfrequency,duration, and quantity of green tea consumption [296].
•Supplementationof800mgEGCGdaily(PolyphenonE)resultedinreducedPSA,hepatocytegrowthfactor(HGF),andvascularendothelialgrowthfactor(VEGF)inmenwithprostatecancer[310].
Soy
•Soyisassociatedwithreducedratesofheartdisease[311-313],protectionagainstosteoporosis[314-315], and certain types of cancer, including prostate cancer [31, 93, 313, 316-323].
•SoyhasbeenonedietarycomponentthoughttoplayaroleinthelowerrateofprostatecancerinAsian countries. Two meta-analyses* found that the consumption of soy foods was associated with a lower risk of prostate cancer [323-324], particularly unfermented soy foods [323].
•Researchshowsthatplantestrogens,suchassoy,mayalsopreventprostatecancerby[317,325]:
➤ Decreasing blood androgen levels.
➤ IncreasingSHBG*(sexhormone-bindingglobulin)concentration.
➤ Bindingtohormonereceptors.
27
➤ Inhibiting 5-alpha reductase.
➤ Restrictingotherenzymesassociatedwithcellgrowth.
➤ Causing direct tumor destruction that essentially starves the tumor.
➤ Decreasing IGF-I [312].
•Plasmaisoflavones,particularlygenisteinandequol(ametaboliteofdaidzein),appearedtoreducethe risk of prostate cancer in the Japan Public Health Center-based Prospective Study [326].
•Recentstudiesfoundthatsoyflour(120mgisoflavonesdaily)[327]andtofu[109]decreasedserumtestosterone levels in healthy men, further substantiating that soy may protect against prostate cancer.
•Alow-fatdietcombinedwithsoyhasbeenshowntodecreasePSAvaluessignificantlyinathree-monthperiod[328].Soyfoodsandalowfatdietmayhaveasymbioticrelationship[329].
•Adifferentstudy,however,foundnosignificantdecreaseinPSAvaluesinmenwhoconsumed44gm soy protein for one month [311]. A review study of prostate cancer patients noted that PSA valuesdecreasedsignificantlywithsoyisoflavonesinfourofeighttrials[330].IsoflavonesinhealthysubjectsdidfavorablyaffectPSA.
•Eatingsoyfoods1×/day and at least 2×/week reduced the risk of prostate cancer by 71% and 62%, respectively compared with men who consumed soy less than once weekly [322].
•Overall,soyproductswerefoundtobesignificantlyprotectiveinastudythatincludeddatafrom42countries [93].
Source Amount of Soy Protein (gm) Amount of Soy Isoflavones (mg)Miso (1 tbsp) 2 7-10*Soybeans, edamame (½ cup) 11 35*Soymilk(8floz) 10 30*Soy nuts (¼ cup) 19 40-50*Tempeh (½ cup) 19.5 36*Tofu(4oz) 13 38.8*
* Isoflavone content varies by brand
Food or Beverage Summary RecommendationFlaxseed Good source of omega-3 fatty acids
and fiber, contains protein, calcium, potassium,Bvitamins,iron,andboron.
Optforgroundflaxseedsratherthanwholeflaxseeds,flaxseedoil,flaxsupplements to increase bioavailability.
Flaxseedsmaybegroundinacoffeegrinder, blender, or food processor.
2tbspgroundflaxseeddaily
Flaxcanhavealaxative-likeeffect, thus, it is wise to gradually increase consumption.
Sprinkle into various foods and beverages, including hot cereals, tomato sauces, fruit smoothies, brown rice or other grains.
Storeflaxintherefrigeratororfreezer.
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Green tea Green tea contains caffeine though much less than coffee or black tea.
If opting for decaffeinated green tea, opt for those naturally decaffeinated with water as typical caffeine extractionresultsinasignificantlossofphytonutrients.
One cup daily would be a healthful addition to your diet, but evidence suggests that three or more cups may be needed for the cancer protectiveeffects[190].
Asqueezeofcitrusenhancesthebioavailability of the polyphenols.
Soy Contains various nutrients, including protein,fiber,calcium,andBvitamins.
Richinantioxidants*,knownasisoflavones, namely genistein and daidzein.
Consume 1 or more servings daily.
Soy supplements or isoflavone extractsarenotrecommended.
Food Safety
•ThefollowingrecommendationshavebeenadaptedfromguidelinesprovidedbytheAmericanCancer Society.
➤ Washfoodsthoroughlybeforeeating.
➤ Keep all aspects of food preparation meticulously clean.
➤ Use special care in handling raw meats, poultry, and eggs.
■ Thoroughly clean all utensils, counter tops, cutting boards, and sponges that touched raw meat.
■ Thaw meats and fish in the refrigerator.
•Donoteatperishablefoodsthathavebeenleftoutoftherefrigeratorformorethantwohours.
•Storefoodsatlowtemperatures(lessthan40°F)tominimizebacterialgrowth.
•Individualsundergoingchemotherapyorwithaweakenedimmunesystemshouldconsideravoidingfoodsthatmayhavebacterialcontamination,includingsushi,saladbars,buffets,unpasteurizedbeverages or food products, and raw or undercooked meat, poultry, fish, and eggs.
Herbs
Milk Thistle
•Preliminaryresearch(invitroandinvivostudiesonly)suggestthatcomponentsinmilkthistle,silymarin and silibinin, inhibit growth and apoptosis of prostate cancer cells [331-337].
•Silibininhasalsobeenfoundtoshowprotectiveefficacyagainstangiogenesisandlatestagemetastasis [336-337].
➤ The mechanism of action is still to be determined, but may be related to the inhibition of the IGF-Ipathway[332,335,338].
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PC-SPES
•CombinationofsevenChineseherbsandoneNorthAmericanherb,sawpalmetto.
•Thisherbalcombinationexhibitsestrogenicactivityandcanreducebloodtestosteronelevels,henceitsassociationwithreducedprostatecancerrisk[339-340].
•FDArecalledPC-SPESsupplementsinFebruary2002becauseitwasfoundtocontainundeclaredprescriptiondrugingredients[339-340].
•AphaseItrialofPC-spes2,arigorouslytestedversion,reporteddecreasedPSAdoublingtimeforadvanced hormone refractory prostate cancer [341].
Saw Palmetto
•Apartiallydried,ripefruitofalowscrubbypalmassociatedwithprostatebenefits.
•Thisbotanical,composedofflavonoids,water-solublepolysaccharides,andfreefattyacids,isbelieved to function as an anti-androgen and anti-inflammatory agent [342].
•Preclinicalstudiessuggestthatsawpalmettocaninducegrowtharrestofprostatecancercellsandinduce apoptosis [343-344].
•Sawpalmettomayreducethegrowthofnormalormalignantprostatecellsbyslowingtheconversion of testosterone to DHT [343-345].
•However,ahumantrialreportedtheuseofcommercialsawpalmetto,whichvarieswidelyindoseand constituent ratios, was not associated with prostate cancer risk [346].
•Researchalsoindicatesbeneficialeffectsonurinaryflowratesinmenwithenlargedprostates,orbenignprostatichyperplasia(BPH)[342].
➤ 320mgdailyseemstobeeffective.
•Sawpalmettomay,likethedrugProscar,lowerPSAvalues.Itisnotclear,however,ifthereisanyeffect on the tumor. In other words, saw palmetto may mask the cancer.
➤ Theuseofsawpalmettomayexcludeanindividualfromparticipatingincertainclinicaltrials.
➤ It is suggested to discontinue the use of saw palmetto three weeks prior to PSA testing.
Turmeric (Curcumin)
•Curcumin,theyellowpigmentandactivecomponentofturmeric,isthemostimportantconstituentamong natural curcuminoids found in these plants [347].
➤ Potentantioxidant*
➤ Anti-inflammatoryeffects[348]
➤ Chemopreventive
➤ Anti-prostate cancer effects
•Curcuminexhibitschemopreventiveandgrowthinhibitoryactivityinseveraltumorcelllines[349-353].
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•Evidencesuggeststhatcurcuminmaysuppresstumorinitiation,promotion,andmetastasis[349,352, 354].
•Resultsindicatethatcurcuminisanovelandpotentinducerofapoptosis*inbothandrogen-dependentandandrogen-independentprostatecancercells[349-350,352-356].
•Additionally,curcuminpromotesdetoxificationintheliverandpossessesanti-inflammatoryactivity,possibly by inhibiting COX-2 activity [357].
•Auniqueanti-inflammatoryherbalpreparation(Zyflamend),whichcontainstumeric,hasbeenfoundto inhibit both COX-1 and COX-2 activity, suppress cell growth, and induce apoptosis* in prostate cancercells[358].
•AphaseItrialreportedthatZyflamendledtoareductioninC-reactiveprotein,NF-kappaB,anddecreasedPSAin48%ofthesubjects[359].
Hormone Deprivation Therapy
•Patientswhoundergohormonedeprivationtherapymayexperiencevarioussideeffects,notablyhot flashes, night sweats, weight gain, and possibly a decline in bone mineral density.
•Whilethepathophysiologyofhotflashesiscomplex,itisnotyetwellunderstood[360].
•Manystudieshavefoundthatdietaryandsupplementalstrategiesdonotappeartosignificantlyaffect hot flashes when compared to a placebo in women.
➤ It should be noted, however, that the placebo effect has been considerable in various studies.
➤ Nonetheless, some studies have found some benefit with soy isoflavones, black cohosh, red clover,andvitaminE[361-363].
➤ Studiesinmenarelacking,buttheresultswouldnotbeexpectedtovaryconsiderably.
•Similarlytowomeninmenopause,menreportsignificantgainsinbodymassincreasedfatmassaccompanied with a decrease in lean body mass while on androgen deprivation therapy (ADT) [364-369].
➤ This change is concerning considering the evidence regarding increased body mass and prostate cancer risk.
•MultipleprospectivestudieshaveexaminedtherelationshipbetweenADTforprostatecancerandbonemineraldensity(BMD).
•Collectively,thesestudiessuggestthatsignificantbonelossisclearlyobservedwithinthefirstyearofADT[366,370-375].
•ClinicaltrialsareneededtoevaluatetheroleofvitaminD,calcitonin,andoralbisphosphonatesforthe prevention and treatment of osteoporosis in patients undergoing ADT [367].
➤ Trials are currently in process to evaluate the role of intravenous bisphosphonates.
•Nonetheless,dual-energyx-rayabsorptiometry(DEXA)screeningforosteoporosisisrecommendedprior to ADT, again at one year, and then at appropriate intervals thereafter, which may be every two years.
•Additionally,serumvitaminD(25-OH)shouldbeassessedwiththesepatients.
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•Patientsshouldbeencouragedtomaintainadequateyetnotexcessiveamountsofdietarycalcium.
•Furthermore,exercise,particularlyresistancetrainingmayreduceriskosteoporosisandincreasemuscle mass [367].
Bone Building Nutrients
Nutrient* Dietary Sources Function RecommendationCalcium Dairy products, canned fish with
soft bones, beans, leafy greens (especially collard greens, bok choy, and kale), tofu, almonds, fortified products, such as soy milk,cereal,andorangejuice
↑ calcium absorption and bioavailability from foods, especially plant sources
VitaminDisessentialforcalcium absorption.
800-1200mgdaily
VitaminK Dark leafy greens, liver, tomatoes, soybeans, and garbanzobeans
Also produced by intestinal Bacteria
Associated with ↓ bone turnover and ↓ urinary calciumexcretion.
120mcgdaily
Phosphorus Meat, poultry, fish, eggs, milk, products, legumes, and nuts
Combines with calcium to strengthen bones.
700mgdaily
Magnesium Wholegrains,nuts,seeds,spinach, and most fruits & vegetables
Important in calcium and potassium uptake.
420mgdaily
Potassium Bananas,strawberries,tomatoes, prunes, potatoes, spinach, and beans
Associated with ↓ urinary calcium and phosphorus excretion.
4700mgdaily
Boron Apples, avocados, beans, milk, peanuts, peanut butter, pecans, raisins, prunes, and potatoes
Improves calcium absorption.
↓ effects of vitamin D and magnesium deficiency.
2 mg daily
Zinc Seafood, meats, tofu, whole grains, black-eyed peas, wheat bran and germ
Important in calcium uptake and immune function.
11-15 mg daily
*VitaminDislistedinprevioustable.
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Summary – Healthy Diet for Prostate Cancer
•Eat8-10colorfulfruitandvegetableservings(4-5cups)daily
➤ 2-3 pieces of fruit
➤ 1 cup or more of vegetables with lunch and dinner
➤ 12floztomato-basedjuice
•Consume30-45gramsoffiberdaily
➤ Youwilllikelymeetyourfibergoalifyoueat8-10servingsoffruitsandvegetablesplusoneserving beans/legumes or at least two servings of whole grains.
•Avoidprocessedandrefinedgrains/flours/sugars
➤ KeepWHITEoffyourplate-bread,pasta,rice,cereal,creamsauces,cakes,andmore.
•Limitoreliminatemeatsanddairy
•Includehealthyfatsdailylikecold-waterfish(i.e.sablefish,salmon,trout,herring,sardines),flaxseed,walnuts,soybeans,avocados,andoliveoil
•Consumedietarylycopene(30mg)regularly
➤ ¾cuptomatosauce,12floztomatojuice,6½tbsptomatopaste.
•VitaminE(50-200IU)
➤ NaturalvitaminEsupplementthatcontainsgamma-tocopherol
•Maintainserum25-OHvitaminDabove40ng/mL
•Drink1-4cupsgreenteadaily
•Drinkplentyoffluids,waterornon-caffeinatedbeverages,dailytohelpmeetfluidneeds
•Engageindailyphysicalactivitytohelpachieveand/ormaintainahealthybodyweight
Practice Precaution•Alwaysdiscusschangesindietandsupplementusewithyourphysician.
Words Of Wisdom“Let food be your medicine and medicine be your food.”
- Hippocrates
For additional information or resources, please visit the Ida and Joseph Friend Cancer Resource Centerat1600DivisaderoStreetonthefirstfloor,orcall(415)885-3693.Theinformationinthispublication is designed for educational purposes only and is not intended to replace the advice of yourphysicianorhealthcareprovider,aseachpatient’scircumstancesareindividual.Weencourageyou to discuss with your physician any questions and concerns that you may have.
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Three Day Menu Plan: 3 Meals + Snack
Thismenuisbasedon2,100calories,caloriescanbeadjustedbyalteringportionsizes.Themenuhasbeendesignedtoserveasaguideinmakinghealthfulfoodchoices.Experimentwithsubstitutions as desired.
Day 1 Day 2 Day 3Oatmeal (1 cup)
Soy milk (1 cup)
Flaxseed,ground(2tbsp)
Dried cranberries (¼ cup
Bagel,wholegrain(1each)
Hummus (2 tbsp)
Tomato (6 slices)
Lemon pepper
Tofu scramble
Tofu(4oz)
Onions (¼ cup)
Peppers (½ cup)
Mushrooms (½ cup)
Toast, whole grain (2 slices)
Jam (2 tbsp)
Turkey sandwich
Wholegrainbread(2slices)
Turkey(2½oz)
Lettuce (1 cup)
Tomato (4 slices)
Red peppers (¼ cup)
Onions (¼ cup)
Mustard (1 tsp)
Peach (1 med)
Chunky Tortilla Soup (2 cups)
Corn tortillas (2 each)
Blackbeans(½cup)
Green salad (2 cups)
Oil/vinegar dressing (2 tbsp)
Salad
Spinach (2 cups)
Broccoli(1⁄3 cup)
Carrots (1⁄3 cup)
Tomato (1⁄3 cup)
Garbanzobeans(½cup)
Barley(½cup)
Walnuts(2tbsp)
Avocado (4 slices)
Oil/vinegar dressing (2 tbsp)
Whole-grainroll
Orange (1 med)
Vegetablejuice(12oz)
Vegetablejuice(12oz)
Granola bar (1 each)
Fruit smoothie
Banana(1each)
Berries(1cup)
Flaxseed,ground(2tbsp)
Soy milk (1 cup)
Brazilnuts(2each)
Vegetablejuice(12oz)
Popcorn (3 cups)
Pasta, whole grain (2 cups)
Tomato sauce (1 cup)
Mushrooms ( 3⁄4 cup)
Broccoli(1cup)
Green salad (2 cups)
Light dressing (2 tbsp)
Chicken & vegetable stir-fry
Chickenbreast(4oz)
Mixedvegetables(2cups)
Walnuts(2tbsp)
Brownrice(2cups)
Salmon(4oz)
Quinoa(1cup)withBrazilnuts(2 tbsp)
Asparagus (1 cup)
Fruit salad (1 cup)
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Recipes
Baked Tofu
Ingredients:
•1poundtofu,firm,drained
•3-4tbspmarinadeorsauce(personalfavorite:VeriVeriTeriyakibySoyVay)
Chop drained firm tofu into 1˝ cubes. Place tofu cubes in glass dish for baking. Pour marinade or sauceovertofu,stirwell.Placetofuinovenat350°Ffor1hour.Stirevery15-20minutes.
Makes four 4-ounce servings.
Nutrition Information (per 4 oz serving):Calories:96 Dietaryfiber:<1gmProtein:8gm Sodium:318mgFat:5gm Calcium:155mg(16%DailyValue)Saturatedfat:<1gm Iron:1.4mg(8%DailyValue)
Recipe developed by Natalie Ledesma, MS, RD, CSO
Washington Insider Salad
Ingredients:
•1can(15oz)kidneybeans,drained
•1can(15oz)blackeyedpeas,drained
•1½cupscookedbarley
•6tbspcilantro,choppedfinely
•1can(11oz)corn
•1½cupstomatoes,diced
•3tbspbalsamicvinegar
•2tbspoliveoil
Preparevegetables.Mixallingredientstogether,andserveonabedofdarkgreenleafylettuce.Addsalt and pepper to taste.
Makes8servings(1cupeach).
Nutrition Information (per serving):Calories:215Protein:10gmFat:4gmDietaryfiber:9gm
RecipedevelopedbySousChefChrisattheOccidentalGrill,WashingtonD.C.
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Thick ‘N Chunky Tortilla Soup
Ingredients:
•1tbspoliveoil
•1cupchoppedonions
•2garliccloves,minced
•3mediumsweetpotatoes,cutinto½˝cubes(4cups)
•3cupschicken(orvegetablebroth)
•½tspcumin
•½tspdriedoreganoleaves
•½tspchilipowder
•¼tspgroundredpepper(cayenne)
•3corntortillas,cutinto½˝strips
•114.5-ouncecandicedtomatoes,drained
•1cupcorn(fresh,frozen,orcanned)
•14.5-ouncecanchoppedgreenchiles,undrained
•2tbspfreshcilantro
Heatovento375°F.HeatoilinDutchovenor4-quartsaucepanovermediumheatuntilhot.Addonions and garlic; cook and stir 5-7 minutes or until onions are tender. Stir in sweet potatoes, broth, cumin,oregano,chilipowder,andcayenne.Bringtoaboil.Reduceheattolow;coverandsimmer10-15minutesoruntilsweetpotatoesaretender.Meanwhile,arrangetortillastripsinsinglelayeronungreasedcookiesheet.Lightlyspraystripswithnonstickcookingspray.Bakeat375°Ffor8-12minutes or until golden brown and crisp. Cool and set aside. Transfer 2 ½ cups hot sweet potato mixturetofoodprocessororblender;processuntilsmooth.Returnmixturetosaucepan.Stirintomatoes, corn, chiles, and cilantro. Cook over medium heat for 5 minutes or until thoroughly heated, stirring occasionally. To serve, spoon soup into individual soup bowls. Top each with crisp tortilla strips.
Makes 5 servings (1 ½ cups each).
Nutrition Information (per serving):Calories:280Protein:8gmCarbohydrate:50gmDietaryfiber:7gmFat:6gm
AdaptedfromTheBestofItalian,Mexican,&ChineseCooking.PillsburyClassicCookbooks;January1999.
36
Barbecued Tempeh with Bell Peppers
Ingredients:
•8-ouncepackagetempeh
•1cupslicedonion
•2mediumredorgreenbellpeppers;slicedinstrips
•1tspmincedgarlic
•¾cupwater
•¼cuptomatopaste
•1-2tbspmolasses
•1-2tbspbrownsugar
•2tspyellowmustard
•2tspapplecidervinegar
•1tspchilipowder
Marinade
•½cuptamariorsoysauce,low-sodiumifdesired
•2tbspricewinevinegar
•4tsplemonjuice
•2tsphoney
Inasmallbowl,combinemarinadeingredientsandmixwell.Placetempehinashallowbowlandpour marinade over it. Cover and refrigerate several hours, turning occasionally. Drain tempeh and reserve marinade. Cut tempeh into ½˝ cubes. Coat bottom of large nonstick skillet with cooking spray andheatovermediumheatuntilhot.Addonionandbellpeppersandcook,stirringoften,untiljusttender,about5minutes.Addmarinadeandallremainingingredients.Bringmixturetoaboil.Reduceheatandsimmer,uncovered,untilmixturethickens.
Makes 4 servings.
Nutrition Information (per serving):Calories:222Protein:18gmFat:5gmSaturatedfat:1gmCarbohydrate:30gmDietaryFiber:7gm
RecipefromVegetarianTimes,September1998.
37
Spinach Spread
Ingredients:
•1package(10-ounces)silkentofu
•1tbsplemonjuice
•¼tspgarlicpowder
•¾tsponionpowder
•½tspdriedtarragon
•¼tspsalt
•1box(10ounce)frozenchoppedspinach,thawed
•1cupcoarselyshreddedcarrots
•¼cupchoppedgreenonion
Pureethetofuandlemonjuiceinblenderuntilsmooth.Whirlinthegarlicandonionpowders,tarragon,andsaltjusttoblend.Scrapeintoamixingbowl.Squeezethespinachasdryaspossible.Stiritintothetofu,alongwiththecarrotsandgreenonion.Mixwell.Servewithcrackers,pitatriangles, or vegetables.
Makes8servings(1/4cupeach).
Nutrition information (per serving):Calories:39 Sodium:82mgFat:1gm Calcium:51mgSaturatedfat:0gm Carbohydrate:5gmProtein:4gm DietaryFiber:2gm
RecipefromtheU.S.SoyfoodsDirectory,1998.
Creamy Tofu Basil Sauce
Ingredients:
•1package(12.3-ounce)silkentofu
•½cupwater
•¾cupfreshbasil,chopped
•4tbspnutritionalyeast
•3tbspBragg’sliquidaminos(ortamariorsoysauce)
•1tbsplemonjuice
•1tspgarlic,minced
• *¾tspblackpepper
**Alternative:Uselime/cilantroratherthanlemon/basil
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Blendallingredientstogetherinablenderorfoodprocessor.Serveoverpasta,vegetables,bakedpotato, or other.
Makes 6 servings (½ cup each).
Nutrition Information (per serving):Calories:47 Carbohydrate:4gmProtein:7gm Dietaryfiber:2gmFat:<1gm
Recipe developed by Natalie Ledesma, MS, RD, CSO
Alaska Salmon Bake with Walnut Crunch Coating
Ingredients:
•1poundsalmonfillets,thawedifnecessary
•2tbspDijon-stylemustard
•1-2tbspoliveoil
•4tsphoney
•¼cupbreadcrumbs
•¼cupwalnuts,finelychopped
•2tspparsley,chopped
•Saltandpeppertotaste
•Lemonwedges
Mixtogethermustard,oliveoil,andhoneyinasmallbowl;setaside.Mixtogetherbreadcrumbs,walnuts, and parsley in a small bowl; set aside. Season each salmon fillet with salt and pepper. Place onalightlygreasedbakingsheetorbroilingpan.Brusheachfilletwithmustard-honeymixture.Pattopofeachfilletwithbreadcrumbmixture.Bakeat450Ffor10minutesperinchofthicknessoruntilsalmonjustflakeswhentestedwithafork.Servewithlemonwedges.
Makes4servings(4ozeach).
Nutrition Information (per serving):Calories:228Protein:20gmFat:12gmOmega-3fattyacids:1.7gm
Adapted from Alaska Seafood Marketing Institute.
39
Vegan French Toast
Ingredients:
•2cupsslicedbananas
•¾cupvanillasoymilk
•1tspcinnamon,or¾tspcinnamonplus¼tspcardamom
•8slicesday-oldwholegrainbread
•1tspcanolaoil
•1mango,peeledandcut
Place bananas, soy milk, cinnamon, and cardamom (if using) in a blender or food processor; blend untilsmooth.Pourmixtureintoapieplate.Dipbreadintomixture,turningtocoatbothsides.Scrapeoffexcessbatter.Brushanonstickskilletorgriddlelightlywithoilorspray.Whenhot,addcoatedbreadslices.Brownononeside,2-3minutes.Turn;brownotherside.Transfertoplates;serveimmediately with mango puree.
Makes 4 servings (2 slices each with 2 tbsp puree).
Nutrition Information (per serving):Calories:116 Carbohydrate:23gmProtein:4gm Dietaryfiber:3gmFat:2gm Sodium:137mg
RecipefromVegetarianTimes,December1995.
Banana Bread
Ingredients:
•¾cupgroundflaxseed
•1cupmashedbanana
•¼cupapplejuiceconcentrate
•½cupagavenectar
•¼cupapplesauce
• Eggreplacerfor2eggsor2eggs(Ener-GEggReplacerismadefrompotatostarch&tapiocaflour; works wonderfully in baked goods.)
•1½cupwholewheatpastryflour
•1tspbakingsoda
•½tspsalt
**Additional optional ingredients may include ½ cup walnuts, raisins, or chocolate chips.
Mixallingredientstogether.Pourinacoated8˝x4˝pan.Bakeat350Fforabout40-45minutes.
Makes10servings.
40
Nutrition Information (per serving):Calories:168 Carbohydrate:29gmProtein:5gm Dietaryfiber:5gmFat:4gm Omega-3fattyacids:1.4gm
Recipe developed by Natalie Ledesma, MS, RD
Dilled Salmon Salad with Peas
Ingredients:
•1can(15oz)salmon,drained
•1package(16oz)frozenpeas,thawed
•¼cuplemonjuice
•¼cupfreshdill(or1-2tbspdrieddill)
•2tbspDijon-stylemustard
•2shallots,slicedthinly(about½cup)
•1bunchradishes(about11medium),thinlysliced
•6cupsredleaflettuce
•Saltandpeppertotaste
Drainsalmon,placeinamixingbowl,andbreakintopieces.Preparethelemonjuice,shallots,radishes,andlettuce.Addtothesalmonthepeas,lemonjuice,dill,mustard,shallots,andradishes.Mixtogethergently.Addsaltandpeppertotaste.Servesalmonmixtureoverlettuce.
Makes 6 servings (2 cups each).
Nutrition Information (per serving):Calories:160Protein:17gmFat:4gmDietaryfiber:5gm
AdaptedfromtheWomen’sHealthyEating&LivingStudy(WHEL)attheUniversityofCalifornia,SanDiego. DevelopedbyVickyNewman,MS,RD,WHELnutritioncoordinator.
Neat Loaf
Ingredients:
•2cupscookedbrownrice
•1cupwalnuts,finelychopped
•1onion,finelychopped
•½mediumbellpepper,finelychopped
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•2mediumcarrots,shreddedorfinelychopped
•1cupwheatgerm
•1cupquick-cookingrolledoats
•½tspeach:thyme,marjoram,sage
•2tbspsoysauce
•2tbspstonegroundorDijonmustard
•Barbecuesauceorketchup
Preheattheovento350°F.Combinealltheingredientsexceptthebarbecuesauceorketchup.Mixfor 2 minutes with a large spoon. This will help bind it together. Pat into an oil-sprayed 5×9˝ loaf pan andtopwithbarbecuesauceorketchup.Bakefor60minutes.Letstand10minutesbeforeserving.
Makes8-10servings.
Nutrition Information (per serving):Calories:204 Sodium:248mgProtein:9gm Cholesterol:0mgFat:9gm Carbohydrate:19gm
Recipe from The Peaceful Palate written by Jennifer Raymond, 1996.
Nutrition ResourcesBooks
TheABC’sofNutritionandSupplementsforProstateCancer–writtenbyMarkMoyad(2000)
Anticancer:ANewWayofLife–writtenbyDavidServan-Schreiber,MD,PhD(2009)
The Color Code – written by James Joseph, Ph.D., Daniel Nadeau, M.D., and Anne Underwood (2002)
EatingYourWaytoBetterHealth:TheProstateForumNutritionGuide–writtenbyCharlesE.MyersJr.,M.D.,SaraSgarlatSteck,R.T.andRoseSgarlatMyers,PT.,Ph.D.(2000)
FoodforLife:HowtheNewFourFoodGroupsCanSaveYourLife–writtenbyNealBarnard,M.D.(1994)
FoodstoFightCancer–writtenbyRichardBeliveau,PhDandDenisGingrasPhD(2007)
HowtoPreventandTreatCancerwithNaturalMedicine–writtenbyMichaelMurray,N.D.(2002)
IntegrativeOncology–writtenbyDonaldAbrams,MDandAndrewWeil,MD(2009)
LifeOverCancer:TheBlockCenterProgramforIntegrativeCancerTreatment–writtenbyKeithBlock,MD(2009)
TheProstateCancerProtectionPlan–writtenbyRobertArnot,M.D.(2000)
Cookbooks
TheCancer-FightingKitchen:NourishingBig-FlavorRecipesforCancerTreatmentandRecovery–writtenbyRebeccaKatzwithMatEdelson(2009)
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CancerLifelineCookbook:GoodNutrition,Recipes,andResourcestoOptimizetheLivesofPeopleLivingwithCancer–writtenbyKimberlyMathaiandGinnySmith(2004)
EattoBeatProstateCancerCookbook–writtenbyDavidRicketts(2006)
HowtoEatLikeaVegetarianEvenifyouNeverWanttoBeOne–writtenbyCarolAdamsandPattiBreitman(2008)
OneBiteataTime:NourishingRecipesforPeoplewithCancer,Survivors,andTheirCaregivers–writtenbyRebeccaKatz,MarshaTomassi,andMatEdelson(2004)
The Peaceful Palate – written by Jennifer Raymond (vegetarian cookbook) (1996)
12BestFoodsCookbook:Over200RecipesFeaturingthe12HealthiestFoods-writtenbyDanaJacobi(2005)
Newsletters/Magazines
CookingLight–http://www.cookinglight.com
EnvironmentalNutrition–http://www.environmentalnutrition.com#(800)829-5384
NutritionActionHealthLetter–http://www.cspinet.org/nah/Fax:(202)265-4954
Websites
AmericanCancerSociety–http://www.cancer.org#(415)394-7100
AmericanInstituteforCancerResearch–http://www.aicr.org#(800)843-8114
Caring 4 Cancer -- Provides up-to-date and comprehensive information on the connection between nutritionandcancer)–http://www.caring4cancer.com
ConsumerLab–Evaluatesqualityofover-the-countersupplementshttp://www.consumerlab.com
Doctor’sGuidetoProstateCancer–http://www.docguide.com
EarthSaveInternational–Promotesfoodchoicesthatarehealthfulforpeopleandtheplanet.– http://www.earthsave.org
IdaandJosephFriendCancerResourceCenter–UCSFMt.Zion–http://cancer.ucsf.edu/crc #(415)885-3693
NationalCancerInstitutehttp://www.nci.nih.gov/#(800)4-CANCER#(800-422-6237)
Oncolink – Provides information regarding clinical trials, newsgroups, psychosocial support, and more.–http://oncolink.upenn.edu
ProstateCancerFoundation–http://www.prostatecancerfoundation.org
ProstatePointers-Comprehensiveprostatecancerwebsitewithafullrangeofsubjectspertinenttoprostatecancer–http://www.prostatepointers.com
SanFranciscoVegetarianSociety–Monthlyrestaurantoutingsandpot-luckdinners; call#415-273-5481.–http://www.sfvs.org
USTOOInternational,Inc.-Nonprofitorganizationoffersdescriptionsoftreatments,onlinenewsletter,glossaryofmedicaltermsandinformationonlocalsupportgroups–http://www.ustoo.com
TheVegetarianResourceGroup-Providesvegetariannutritioninformationandvegetarianrecipes –http://www.vrg.org
WebMD–http://my.webmd.com
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Glossary
Angiogenesis – The formation of new blood vessels.
Antioxidant–Asubstancethatinhibitsoxidationorinhibitsreactionspromotedbyoxygenorperoxides.
Apoptosis – Programmed cell death.
Carcinogenesis–Beginningofcancerdevelopment.
Case-Control Studies – An epidemiological study in which a group of, say, cancer patients (cases) is compared to a similar but cancer-free population (controls) to help establish whether the past or recenthistoryofaspecificexposuresuchassmoking,alcoholconsumptionanddietaryintake,etc.are causally related to the risk of disease.
Catechin – One of the tannic acids; phytonutrient, specifically, one of the flavonoids found in green tea.
Creatine – An amino acid that is formed in the muscle tissue of vertebrates; supplies energy for muscle contraction.
Cohort Studies – Follow-up study of a (usually large) group of people, initially disease-free.Differences in disease incidence within the cohort are calculated in relation to different levels of exposuretospecificfactors,suchassmoking,alcoholconsumption,dietandexercise,thatweremeasured at the start of the study and, sometimes, at later times during the study.
Eicosanoids–Biologicallyactivecompoundsthatregulatebloodpressure,bloodclotting,andotherbodyfunctions.Theyincludeprostaglandins,thromboxanes,andleukotrienes.
Endogenous – Originating from within, as within the body.
Epidemiological – Of or relating to epidemiology; the branch of medicine that involved the study of the causes, distribution, and control of disease in populations.
Glutathione – A polypeptide produced primarily in the liver; involved in DNA synthesis and repair, proteinandprostaglandinsynthesis,aminoacidtransport,metabolismoftoxinsandcarcinogens,immunesystemfunction,preventionofoxidativecelldamage,andenzymeactivation.
Insulin – Insulin is a hormone produced by the pancreas in the body that regulates the metabolism of carbohydrates and fats, especially the conversion of glucose to glycogen, which lowers the body’s blood sugar level.
Lignans–Phytoestrogensthathaveasimilarchemicalstructuretoestradiolandtamoxifen;appearto offer protection against breast cancer.
Meta-analysis – The process of using statistical methods to combine the results of different studies.
Mutation – Abnormal cell development.
Nitrosamines – Derivatives of nitrites that may be formed in the stomach when nitrites combine with amines; carcinogenic in animals.
Phytonutrients – Plant compounds that appear to have health-protecting properties.
Polyphenols–Phytonutrientsthatactasanantioxidant;compoundsthatprotectthecellsandbodychemicals against damage caused by free radicals, reactive atoms that contribute to tissue damage in the body.
Sex hormone–binding globulin (SHBG) – A protein in the blood that acts as a carrier for androgens and estradiol; inhibits the estradiol-induced proliferation of breast cancer cells.
Your Health MattersAccess our patient education library online atwww.ucsfhealth.org
Physician Referral Service: 888/689-UCSFPhysician Referral Service: 888/689-UCSF
References are available at www.cancer.ucsf.edu/crc/nutrition.php or http://urology.ucsf.edu/patientGuides/uroOncPt_Doc.html.
Thesematerialsweredevelopedby:
Natalie Ledesma, MS, RD, CSO Ida & Joseph Friend Cancer Resource Center UCSF Helen Diller Family Comprehensive Cancer Center University of California, San Francisco
RevisedDecember2009 SDURO0200
