Post on 28-Dec-2015
Protein
Complete and Incomplete
Protein has multiple functions
Build and repair body tissue Provide Energy Maintain cell growth
•
Must be supplied daily
Constantly needed to replace wear and tear of tissue and keep up protein concentration
in the blood
Protein provides energy
Can take the place of some fat and carbohydrate
Excess protein converted to energy
Stored as fat
Fats and carbs cannot replace protein
Excess protein, once converted to energy, cannot convert back to protein
The best sources of protein
Milk Eggs Fish Poultry Red Meat
Excessive Protein
Converted to energy May do more harm
than good Not necessary to eat
a lot.
Amino Acids
Building Blocks from which new proteins are made.
There are 22 different ones, but 9 are essential for good health.
Complete Protein
Any food that has all 9 essential amino acids.
All animal proteins are classified as complete proteins.
Support growth and maintenance of body tissue
Complete protein plant sources
Brewers Yeast Certain nuts Soybeans (tofu) Cottonseed Germ of grains
Partially Complete Amino Acids
Provide normal maintenance Do not support growth Some plant foods contain
protein, but not all essential amino acids
Incomplete Proteins Beans Nuts and grains
legumes peanut butter
• •
Eat a variety of food
Make certain the body gets all the essential amino acids.
Make protein complete Combine plant and
animal food Combining plant
protein from variety of cereals and grains
•
• • •
Protein not immediately needed
Excreted by the body Converted to Fat and stored in adipose (fat)
tissues in body. Cannot be converted back into amino acids 4 Calories per gram
Extending Proteins
Chicken and Rice Chili con carne Macaroni and Cheese Tuna Noodle Casserole Also called “sparing”
•
Protein needs influenced by
Age Body Size Quality of the proteins Physical state of the
person 3-6 ounces per day or
2-3 “servings”
Insufficient Protein
Lower one’s resistance to disease,
Damage liver Death Tiredness Weight loss Lack of energy Stunt growth Not common in U.S.