Download Sp11 HE325 Proteins

From Greek “protos”
 Major component in all animal and plant
tissues
 Made up of hydrogen, oxygen, carbon
and nitrogen


Source: http://minimalpotential.files.wordpress.com/2007/11/3351.png

Amino Acids
› Building blocks for proteins
› 20 amino acids
 11 can be made in the body
 9 are essential

Enzymes
› Facilitate and accelerate chemical
reactions

Antibodies
› Fight illness

Hemoglobin
› Transport oxygen in the blood

Hormones
› Regulate body functions

Growth and maintenance
› Help grow and repair body tissues
› Add structure to body tissues

Source: http://library.thinkquest.org/11226/image/digest.jpg
10-35% of intake should be protein
 Males (18 + y/o): 59-63 grams/day
 Females (18 + y/o): 44-50 grams/day


Calculation:
› 0.8 gram/kilogram of body weight

Infants needs the most protein

How do you get protein in your diet?

Animal products are the best source
› Meat, eggs, milk, legumes, grains,
vegetables

Supply all essential amino acids in the
correct amount for the body to use.
› Animal proteins are complete

Plant proteins are incomplete
› Exception: soybean protein

Vegetarians need to eat plant proteins in
combination

It is possible to get too much.
› Extra calories
› Kidney strain
› Mineral loss
› Heart disease
› Cancer

What foods do you eat that contain
protein?
› Are there some that are better than others?

What is vegetarianism?

Why become a vegetarian?
› Scarcity of food
› Religious beliefs
› Concern for health or the environment
› Concerns about animals
Semi-vegetarian
 Pesco-vegetarian
 Lacto-ovo-vegetarian
 Lacto-vegetarian
 Ovo-vegetarian
 Vegan
 Fruitarian

Lower risk of heart disease
 Lower risk of cancer
 Less likely to be overweight

Not getting enough protein
 Osteoporosis
 Anemia


Choosing foods to eliminate health risks