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Nutrition A lifelong pursuit.

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Presentation on theme: "Nutrition A lifelong pursuit."— Presentation transcript:

1 Nutrition A lifelong pursuit

2 Key terms to know NUTRITION~ study of nutrients and how the body uses them NUTRIENTS~ life sustaining chemical compounds in food; released as food breaks down MALNUTRITION~ faulty or inadequate nutrition

3 Calories Calories Measure energy supplied by food and energy used by the body. Energy comes from 3 nutrients Carbohydrates Proteins Fats Nutrient Density: is a way of comparing the amount of energy or calories supplied by a food with the nutrients its provides.

4 6 Main Nutrients Carbohydrates- provides the body’s main source of energy Fats-provided a concentrated source of stored energy as well as insulation for the body Vitamins-help regulate many vital processes Proteins-help build, repair and maintain body tissues Minerals-help the body work properly Water- participates in chemical reactions in the body and helps transport materials to and from cells

5 Carbohydrates are the bodies chief source of energy
1 gram of carbohydrate=4 calories Simple carbohydrates Complex carbohydrates Carbohydrates rich in fiber may help prevent cancer (adults need grams of fiber daily) Simple carbs include mono and di saccharides Complex carbs include polysachharides

6 Sources of carbs Simple carbs -sugars -syrups -candies -jams -jellies
-pastries -dried fruits Complex carbs -cereal grains -legumes -pasta products -breads -crackers

7 Fiber Plant materials that your body cannot digest.
Grains, dry beans, peas, vegetables Helps maintain a healthy digestive system Can also help reduce the risk of cancer and heart disease How Much do you need? If you are under 18: Just add 5 to your age (grams) ex: 12+5= 17 grams

8 Fats Fats belong to a larger group of compounds called lipids
Lipids includes both fats and oils 1 gram of fat=9 calories Cholesterol is a fatlike substance found in every cell in the body-it is also found in skin tissue and helps produce hormones Your body makes all of the cholesterol that it needs-you do not need it in your diet! Cholesterol only occurs in products of animal origin

9 Functions and Sources Body stores energy as fat
Fat protects internal organs Insulates the body from shock and temperature changes Help transport fat soluble vitamins High fat foods include -butter -margarine -most salad dressings -oils -vegetable shortenings -egg yolks -meats -avocados

10 Protein found in every body cell 1 gram of protein=4 calories
Proteins are made up of small units called Amino Acids There are 22 amino acids, 9 of these are called Essential Amino Acids You must get the essential amino acids from the foods that you eat The other amino acids are nonessential-your body produces what it needs

11 Types of proteins Complete Proteins- contain all 9 essential amino acids in sufficient amounts. Complete proteins will support growth and normal maintenance of body tissues (animals foods contain complete proteins) Partially Complete Proteins- contains all 9 essential amino acids, but they have a limited amount of 1 or more if these amino acids Incomplete proteins- missing 1 or more of the essential amino acids

12 Functions and Sources Functions Sources Provide amino acids which your body needs for growth Regulation of bodily processes, such as fluid balance in cells Many factors affect a persons need for proteins- age, body size, quality of proteins and physical state Important sources-lean red meats, poultry, fish, milk, milk products and eggs Other sources-dried beans, peas and nuts

13 Protein Deficiencies Extreme protein deficiency can result in Kwashiorkor, a condition including -discolored skin -stunted growth -body sores -bulging abdomen -listlessness -mental retardation

14 Vitamins complex organic substances Needed in small amounts
Body does not produce enough, so we need to eat them Vitamins are either fat soluble or water soluble Fat soluble=vitamins A,D,E,K Water soluble=Vitamin C and B complex

15 Minerals Inorganic substances Make up 4% of your body weight
Need at least 21 minerals for good health Body needs minerals to build bones, soft tissues, and other compounds Help regulate body processes Macrominerals=calcium, phosphorus, magnesium, sodium, potassium, chlorine Trace elements(microminerals)=iron, zinc, fluorine Both are equally important for good health

16 Water Body must have water to function
Can only live a few days without it 50%-75% of your body weight is water Your body takes the water it needs from the foods you eat and what you drink 54% comes from drinks-water, milk, clear soups, coffee, tea, fruit juice 37% comes from food 9% comes as a by- product of metabolism

17 Eating a wide variety of nutritious food is the best source of all nutrients.

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