Nutrition
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Transcript of Nutrition
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NutritionMr. Ramos
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Objectives◦ Identify types and sources of nutrients.
◦ Describe how to use the Dietary Guidelines.
◦ Discuss how to use the Food Guide Pyramid.
◦ Discuss how to distinguish between foods that are healthful and those that do not contain many nutrients.
Lesson 1:Following the Dietary Guidelines
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Food is the body’s source of energy
Energy in food is measured in units called calories or Calories.
The body uses nutrients to build and maintain tissues, help with body processes, or provide energy.
Types of Nutrients
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Proteins◦ Growth & Repair Body◦ Animal products, such as meat & eggs offer
complete proteins◦ Amino acids make proteins
6 Types of Nutrients
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Carbohydrates◦ Provide the main source of energy for the body◦ Simple carbohydrates are sugars: fruit & milk◦ Complex carbohydrates are starches: bread, rice,
cereal, & potatoes.
6 Types of Nutrients
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Fats◦ Provide long term energy storage◦ Absorbs certain vitamins◦ Help maintain healthy hair & skin◦ Saturated fats are solid at room temperature◦ Unsaturated fats are liquid at room temperature
6 Types of Nutrients
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Vitamins◦ Control processes in the body◦ Vitamin C helps your heart & muscles◦ Vitamin C can be found in fruits, meat, & eggs
6 Types of Nutrients
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Minerals◦ Involved in many body activities◦ Iron is essential for building blood & muscle◦ Calcium helps build strong bones
6 Types of Nutrients
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Water◦ Regulates body temperature◦ Helps eliminate waste◦ Chemical processes in the body occur in water◦ 6 – 8 Ounces of water daily
6 Types of Nutrients
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Nutrition is the process by which the body takes in and uses food.
The Dietary Guidelines for Americans are a set of diet & lifestyle recommendations for healthy Americans ages two & older.
The United States Department of Agriculture (USDA) wrote the Dietary Guidelines.◦ Aim for fitness◦ Build a healthy base◦ Choose sensibly
Dietary Guidelines: “You are what you eat”
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Aim for a healthful weight◦ Eat smaller meals◦ Reduce the risk of diabetes & heart disease◦ Consume meals rich in vitamins & minerals, & low
in saturated fats Be physically active each day
◦ 60 minutes of moderate activity each day◦ Walk, swim, skate, etc.
Aim for Fitness
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Use the food guide pyramid Choose a variety of grains
◦ Good source of fiber Choose a variety of fruits & vegetables
◦ Good source of fiber Keep food safe to eat
◦ Refrigerate meat, dairy, & egg products
Build a Healthy Base
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Avoid foods that are high in fats, sugars, & salts. Choose a diet low in saturated fats & cholesterol
& moderate in total fat Choose beverages and foods to moderate your
intake of sugar. Choose and prepare foods with less salt. Do not drink alcohol.
Choose Sensibly
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Food Guide Pyramid helps you choose healthier food.
Foods at the bottom of the pyramid are more important.
Limit foods at the top of the pyramid
The Food Guide Pyramid
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Food Groups Servings Per Day One Serving Equals
Milk, Yogurt, & Cheese Group 2-3 1 cup milk,1 cup yogurtI.5 ounces natural cheese2 ounces processed cheese
Meat, Poulty, Fish, Dry Beans, Eggs, & Nut Group
2-3 2-3 ounces of cooked lean meat, poulty, or fish½ cup of dry beans1 egg2 tablespoons peanut butter
Fruit Group 2-4 1 medium apple, banana, or orange½ cup cooked, canned, or raw chopped fruit¾ cup 100% fruit juice
Vegetable Group 3-5 1 cup raw, leafy vegetables½ cup other cooked or chopped raw vegetables¾ cup 100% vegetable juice
Bread, Cereal, Rice, and Pasta Group
6-11 1 slice of bread or ½ bagel, regular size1 ounce ready to eat cereal½ cup cooked cereal, rice, or pasta
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Limit foods that do not contain many nutrients: chips, cookies, candies, & ice-cream.
Go easy on oils, salad dressings, & buttery spreads.
Cut back on canned foods, instant soups, & lunch meals, such as bologna & ham. These foods contain a lot of sodium.
Increase your fiber intake by eating whole grain breads.
Food Choices
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Vitamin What it does Some sources
Vitamin A Maintains healthy teeth, skin, & eyes
Milk, cheese, liver, carrots, apricots, cantaloupe, sweet potatoes, dark green leafy vegetables
B vitamins Support heart, nerve cells, brain, & blood
Lean meats, poulty, fish, nuts, eggs, some packaged bread
Vitamin C Promotes healthy teeth & gums and helps to heal wounds
Citrus fruits, strawberries, broccoli, collard and mustard greens
Vitamin D Helps the body absorb calcium, essential for healthy
Milk, cheese, butter, fish, some cereals, sunlight
Vitamin E Slows again and supports formation of red blood cells
Wheat germ, corn, nuts, vegetable oils, green leafy vegetables.
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Mineral What it does Some sources
Iron Builds muscles and transports oxygen to blood
Beef, poulty, seafood, spinach, whole grains
Calcium Promotes strong teeth and bones
Milk, tofu, broccoli, some juices and cereals
Magnesium Assists nerves and muscles Nuts, beans, dark green vegetables
Zinc Heals wounds and aids growth Meat, liver, eggs, wheat germ, whole grains
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Objectives◦ Demonstrate how to analyze a food label to
evaluate and compare food choices.
◦ List and analyze the influences on food choices.
◦ Describe how to plan healthful meals in a variety of settings.
◦ Explain how to plan, shop for, and prepare healthful meals and snacks.
Lesson 2:Improving Your Eating Habits
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All processed food packages must have a Nutrition Facts Panel.
A processed food is a food that has been specially treated or changed. ◦ Examples: crackers, cookies, frozen dinners, and
macaroni & cheese.
A Nutrition Facts Panel is a label that provides information about the calories and nutrients that the food contains.
Analyzing Food Labels
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Reading a Nutrition Facts Panel
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Trans fats are harmful fats found in hydrogenated, or partially solidified, oils such as margarine and shortening. ◦ Chips, cookies, crackers, & cakes usually have trans fats,
which may provide even more cholesterol than saturated fats.
Analyzing Food Labels
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Availability – teens choose foods that are available to them
Family Influence – culture, background, & religion play a role in what people eat
Health Benefits – people avoid certain foods if they’re allergic, or they may eat broccoli & other high calcium foods to reduce the risk of developing osteoporosis
Influences on Your Food Choices
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Situation – people choose different foods depending on who they are with
Mood – people choose certain foods when they are bored, happy, depressed, or angry
Body Image – worrying about being too fat or too skinny may cause people to choose certain foods over others
Influences on Your Food Choices
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Cost – the amount of money people have & the price of the food determines what they will buy
Media – people are influenced to eat what they see in the media
Vegetarian lifestyle – vegetarians avoid red meat, chicken, and fish.
Vegan lifestyle – vegans reject all animal products, such as dairy, eggs, and honey.
Influences on Your Food Choices
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Pay attention to Nutrition Facts Panel & avoid large quantities of fat, sugar, & sodium.
Foods labeled “fat free” have less than ½ of a gram of fat per serving.
Foods labeled “low fat” have 3 grams of fat or less.
Making Responsible Shopping Choices
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Try shopping at stores that sell bulk foods. Bulk foods are often cheaper than foods that come in small packages.
Avoid foods that come in smaller packages.
At grocery stores, the more expensive products are usually placed at eye level.
Making Responsible Shopping Choices
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Provide steamed vegetables as a side dish.
Use skim or 1% milk for cereal & hot chocolate.
Avoid overuse of salt by adding herbs, such as rosemary, oregano, or basil to pasta or rice.
Order baked or broiled food instead of fried food.
Choose fruit or sorbet for dessert instead of ice cream.
Planning Healthful Meals
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You can get some of the important vitamins and minerals you need by eating foods that are fortified.
To fortify is to add vitamins or minerals to a food.
Example: Most milk is fortified with vitamin D. Vitamin D helps the body absorb Calcium.
The Role of Supplements
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A nutritional supplement is a nonfood pill, powder, or liquid that contains vitamins, minerals, or other healthful substances that some people want to add to their diet.
The Role of Supplements
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1. How many calories are in 4 cookies?
2. How many calories are in the whole bag of cookies?
3. How many calories are in 12 cookies?
4. How much total fat is in 4 cookies?
5. How much total fat is in the whole bag of cookies?
6. How much total fat is in 12 cookies?
Nutrition Math Activity
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Nutrition Math Activity 7. How many grams of protein
are in 4 cookies?
8. How many grams of proteinare in the whole bag of cookies?
9. How many grams of proteinare in 12 cookies?
10. How much sodium is in 4 cookies?
11. How much sodium is in the whole bag of cookies?
12. How much sodium is in 12 cookies?
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Objectives:◦ Describe foodborne illnesses and their sources.
◦ Identify the symptoms and treatments of foodborne illnesses.
◦ Discuss how to reduce the risk of foodborne illnesses.
Lesson 3:Foodborne Illnesses
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A foodborne illness is an illness caused by consuming foods or beverages that have been contaminated with pathogens or toxins produced by pathogens.
Bacteria are tiny one celled organisms.
Some bacteria are beneficial and others cause disease.
Foodborne Illnesses
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Bacteria can contaminate food.
To contaminate is to make dirty or impure.
Bacteria can spread easily from food to your hands or to other foods.
Bacteria can be destroyed through pasteurization.
Pasteurization is a process by which a food or liquid is heated to kill harmful organisms.
Foodborne Illnesses
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Sources of Foodborne IllnessesBacteria Illness Sources
Campylobacter jejuni Campylobacteriosis Contaminated water, raw or undercooked meat
Clostridium botulinum Botulism Improperly canned food, home-canned vegetables, smoked or raw fish, honey or corn syrup.
Escherichia coli E. coli infection Raw or rare ground beef, unpasteurized apple juice or cider, contaminated water.
Listeria monocytogenes Listeriosis Hot dogs, cold cuts, soft cheese, unpasteurized milk
Salmonella Salmonellosis Raw or undercooked eggs or poultry, owning a pet iguana, turtle, or lizard
Shigella Shigellosis Contaminated water, improper food handling, especially of salads or leafy vegetables
Staphylococcus aureus S. aureus food poisoning Food handling by someone with a skin infection, keeping food at room temperature.
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Fever, nausea, vomiting, cramps, & diarrhea are typical symptoms of foodborne illness.
You should rest and drink plenty of fluids.
Symptoms & Treatment for Foodborne Illnesses
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It’s easy to transfer bacteria from one food to another, especially if you use the same knife or cutting board to prepare different foods without washing them in between.
Hygiene is healthful behaviors, such as cleanliness, that promote health & prevent disease. ◦ Example: washing hands after using bathroom
How Foodborne Illnesses Spread
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More foodborne illnesses occur in the summer, when the air is warm and bacteria grow more quickly, than in any other season.
Select your cold & frozen foods last when grocery shopping.
Rinse the top of cans and the can opener as well.
How Foodborne Illnesses Spread
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Wash your hands before preparing food with soap for at least 20 seconds.
Don’t chop salads on the same cutting board you used for raw meat without washing the board first.
Always wash fruits & vegetables before eating them.
Keeping Food Safe
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Store meats and fish in heavy plastic containers in the refrigerator so that the juices don’t drip onto other foods.
Keep raw poultry, fish, eggs, and meat away from other foods, utensils, or plates.
Keeping Food Safe
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Always cook foods well.
Microwaves do not heat food evenly, so stop the microwave & stir the food.
Use a microwave-safe container & loosely covered. This produces steam inside the container to kill bacteria.
Keeping Food Safe
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Freeze all fish or meats that you cannot use in a few days.
Cut large chunks of meat into slices. Bacteria can grow in big portions of food because they take long to cool
Defrost food in the microwave or fridge; do not leave food to defrost on counter.
Use leftovers in fridge within 3 to 4 days.
Never leave meat, poultry, fish, or eggs at room temperature for more than two hours, or one hour if temperature is 90°F or above. Bacteria grow quickly when temperature is between 40°F and 140°F.
Keeping Food Safe
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Objectives:◦ Determine healthful weight and body
composition.
◦ Assess the health risk associated with being overweight or underweight.
◦ Identify strategies for healthful weight management.
Lesson 4:Maintaining a Healthful Weight
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The healthful weight range for a person depends on many factors: height, build, muscle mass, & fat.
Body composition is the percentage of fat tissue and lean tissue in the body. ◦ Skin-fold measurement Test◦ Electrical Devices
Healthful WeightSome tests
are not 100% accurate
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A Height-Weight Chart can determine if your weight falls within a healthful range.
However, these charts do not take into account whether most of your weight is from fat or muscle.
Finding Your Healthful Weight
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The Body Mass Index (BMI) is a formula used to determine whether a person’s body weight is healthful.
There is a BMI scale for adults, children & teens ages 2 to 20.
Some people whom the BMI classifies as overweight may simply have more muscle tissue than others and may not be unhealthy.
Underweight BMI = under 5% BMI
Appropriate BMI = 5% - 85% BMI
Overweight BMI = 85% - 95% BMI
Healthfyl Weight: Body Mass Index
Some tests are not 100%
accurate
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Body Mass Index (BMI)
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BMI for Boys & Girls
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Being too fat or too thin can pose health risks.
Excess calories result in weight gain.
Female teens need about 2,200 Calories/day.
Male teens need about 2,800 Calories/day.
About 60% of these calories meet the body’s basic needs, such as tissue growth & heart & lung function.
Avoiding Extremes
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Being overweight means weighing more than is healthful for your height according to set standards.
Overweight adult has a BMI of 25 to 29.9
Obesity is having a BMI of 30 or more.
Overweight & obese individuals are at greater risks for heart disease, arthritis, high blood pressure, diabetes, and some cancers.
Avoiding Extremes: Overweight
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Overweight Problems ◦ Low self esteem◦ Bullying & Teasing◦ Avoid Social Gatherings◦ Hard time making friends
Emotional State of Being Overweight
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Underweight is weighing less than is healthful for your height according to set standards.
Some teens may be slightly underweight because their bodies are developing more slowly than those of their peers.
Those who do not consume enough calories might become ill more often than others their age, & have a poor immune system.
Avoiding Extremes: Underweight
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Weight management is a combination of healthful eating and regular physical activity.
Metabolism is the process by which the body converts food to energy.
Physical activity increases your metabolism.
Managing Your Weight
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What to do if you are overweight◦ Eat smaller portions
◦ Eat a nutritious breakfast
◦ Don’t skip meals or rely on snacks for energy
◦ Aim for a loss of ½ - 2 pounds per week
◦ Perform physical activity for at least 1 hr each day
◦ Use stairs instead of elevator
Managing Your Weight: Losing Weight
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What to do if you are underweight◦ Aim for highest number of servings recommended from
each food group in the Food Guide Pyramid
◦ Choose calorie-rich foods in each food group
◦ Eat three meals a day & include 2 or 3 healthful snacks in between
◦ Ask your doctor if you should drink a liquid supplement. Some shakes & smoothies can give you extra calories.
Managing Your Weight: Gaining Weight
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Fad diets promise quick results but usually do not work.
Fad diets often lead to more weight gain.
Remember that healthful weight loss or gain takes time, involves eating right, and exercising.
Fad Diets
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Objectives:◦ Discuss what body image is and what influences
it.
◦ Identify signs and symptoms of eating disorders.
◦ Describe prevention and treatment for eating disorders.
Lesson 5Recognizing Eating Disorders
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Body image is the way a person feels about his or her appearance and perceives that others view him or her.
Factors that affect body image include opinions, culture, and the media.
Television, movies, and magazines sometimes portray the ideal female as much thinner and the ideal male as much leaner.
Your Body Image
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The average female model is 23% thinner than the average American female.
Females are more likely to dislike their bodies than males.
Some male teens have a negative body image, and they take physical activity & exercise to an extreme.
Your Body Image
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An eating disorder is an emotional disorder in which a person chooses harmful eating patterns. ◦ More common in women than men.
Anorexia nervosa is an eating disorder in which a person starves himself or herself and has a weight of 15% or more below normal.
Eating Disorders
Risks:1. Malnutrition
2. Organ damage3. Irregular heartbeats
4. Fatigue5. Stomach pain6. Constipation7. Yellow skin8. Hair loss
9. Growth of excess body hair
10. Absence of menstruation
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Bulimia Nervosa is an eating disorder in which a person eats a great deal of food in a short period and then rids the body of the food. ◦ Purging, laxatives, or diuretics
People who have bulimia may be at a healthful weight, unlike people with anorexia.
Eating Disorders
Risks:1. Damaged tooth enamel
2. Swollen cheek/face3. Sore gums
4. Dry & brittle hair5. Irregular bowl movements
6. Heartburn 7. Stomach cramps
8. Increase in blood pressure9. Damage to organs
10.Rupture of esophagus
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Binge eating disorder is an eating disorder in which a person engages in uncontrollable eating. ◦ They may eat in secret even if they are not hungry.◦ No purge
Up to 40% of people who are obese may have binge eating disorders.
Eating Disorders
Risks:1. Overweight
or obesity2. Premature heart disease3. High blood
pressure4. Diabetes5. Certain cancers
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Each disorder is associated with a specific behavior.
Teens with anorexia may make excuses to avoid meals.
Teens with bulimia may excuse themselves to go to the bathroom after meals.
Teens with binge eating disorder eat regularly and gain excessive amount of weight.
Warning Signs
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If you suspect that you or a friend has an eating disorder, talk to a parent, guardian, or health professional as soon as possible.
Medical doctors may treat physical ailments associated with the disorder.
Mental health professional may help the victim discover the source of the problem.
People with eating disorders may access the Web site of the National Eating Disorder Organization for information and help.
Treatment for Teens with Eating Disorders
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Registered dietitians have knowledge of eating disorders and experience with helping people who have them.
Registered dietitians can make responsible eating decisions.
Treatment for Teens with Eating Disorders
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Appreciate what your body can do◦ Running, laughing, and dreaming
Carry yourself with a sense of pride◦ People will respect you if you have confidence
Wear clothes that make you feel good about your body
Treat your body well◦ Listen to music, dance, and take scented baths
Developing a Positive Body Image