1. Choosing healthy foods
Unit 5
Choosing healthy foods

2. Nutrition
Nutrition: the sum of the processes by which humans, animals, and plants consume foods.
Nutrient: a substance in food that helps with body processes.
Calorie: unit of energy produced by food.

3. 6 Categories of nutrients
Proteins
Carbohydrates
Fats
Vitamins
Minerals
Water

4. Protein
Protein: a nutrient needed for growth, and to build and repair body tissues.
2 kinds of Proteins: Complete and Incomplete
Complete proteins: contains all the essential amino acids.
Amino acids: building blocks that make up proteins.
Example: meat, fish, milk, yogurt, eggs.
Your body needs 20 amino acids. The body only produces 11.
Essential amino acids: the 9 AA that your body cannot produce.

5. Protein
Incomplete Protein: protein from plant sources that does not contain all of the essential amino acids.
Ex: grains, legumes, nuts and seeds.

6. Carbohydrates Carbohydrates: main source of energy for the body.
Body can only store a certain amount of carbs, the rest is stored as fat.
2 types: Simple and Complex
Simple: sugars that enter the bloodstream rapidly and provide quick energy.
Provide calories, but small amount of vitamins and minerals.
Found naturally in fruits, honey, and milk.

7. Fats Fats: provides energy and helps the body store and use vitamins.
Fats supply more than twice the amount of calories than proteins and carbohydrates.
Saturated fats: found in dairy products, solid vegetable fat and meat poultry.(solid form)
Contribute to body’s cholesterol: fat-like substance made by the body and found in certain foods.

8. Fats
Unsaturated Fats: a type of fat obtained from plant products and fish. (usually liquid form)
2 types: polyunsaturated and monounsaturated
Polyunsaturated: sunflower, corn, and soybean oils.
Monounsaturated: olive oil and canola oils.
Trans-fatty acids: fatty acids that are formed when vegetable oils are processed into solid fats. (margarine, shortening)
- process is called hydrogenation- makes oils more solid, more stable.

9. Vitamins
Vitamin: a nutrient that helps the body use carbs, proteins and fats.
Provide no energy to body, but helps release energy from other nutrients.
Fat- soluble vitamins: vitamin that dissolves in fat and can be stored in body. (A, D, E, K)
Water- soluble: vitamin that dissolves in water and cannot be stored by the body in large amounts. ( C,B)

10. Minerals Mineral: regulates many chemical reactions in body.
2 types: Macro minerals and Trace minerals
Macro: required in amounts larger than 100mg.
Examples: calcium, sodium.
Trace Minerals: needed in very small amounts. Examples: iron and zinc. Important to macro minerals.

11. Water Water is involved with all body processes.
Makes up the basic part of blood, regulates body temperature.
Dehydration: a condition when water content of the body has fallen extremely low.
Can be caused by lack of water intake, dry environment, fever, vomiting.
Common signs: fatigue, dry mouth, dizziness, weakness, dry skin, rapid pulse

12. Water How much water is needed?
Sources: juice, milk, soup, frozen juice pops, fruits, and vegetables
Do not substitute soda for water. These have caffeine, which is a diuretic.
Diuretic: product that increases the amount of urine excreted.
Important to drink water when sick to make sure you do not dehydrate!

13. Supplements
Herbal supplements: contain extracts or ingredients from the roots, berries, seeds, or flowers of plants.
Tablets, capsules, powders, gelcaps, liquids
Creatine: amino acid made in liver, kidneys and pancreas. Also found in meat and fish.
Popular dietary supplement used in teens to increase performance in sports.

14. Supplements
Protein supplements: product taken orally that contains proteins that are intended to supplement diet and are not considered food.
People who take these supplements want to build muscle. However, excess protein will turn to fat, not muscle.

15. Food Groups

16. Dietary Guidelines USDA: U.S. department of agriculture
Designed to promote health
1. Eat a variety of foods and keep foods safe to eat.
2. Balance the food you eat with physical activity.
3. Choose a diet low in fat, saturated fat, and cholesterol.

17. Dietary Guidelines
4. Choose a diet with plenty of grain products, vegetables, and fruits.
5. choose a diet moderate in sugars, salt, and sodium.
6. Do not drink alcohol, or drink in moderation (if you are an adult.)

18. Vegetarian Diets Vegan: excludes foods of animal origin
Lacto-vegetarian: excludes eggs, fish, poultry, and meat.
Lacto-ovo-vegetarian: excludes fish, poultry, and red meat
Semi-vegetarian: excludes red meat.

19. Benefits
Animal products are sources of fat, saturated, and cholesterol.
Less likely to develop high blood pressure, heart disease, diabetes, and breast and colon cancer.
Easy to maintain healthy weight
* you should talk to parents of guardian if you choose these diets.
* you still need to get the nutrients from other sources.