Question

Name two main sources of food

Answer 1

Answer:

Animal-based foods are the main sources of complete protein and include meat, fish, poultry, eggs, milk and cheese. Plant-based foods also contain protein, but are "incomplete"sources of protein, meaning they contain only some of the essentialamino acids.

Answer 2

Answer:

Proteins, fats and carbohydrates provide the calories your body needs for energy, and a healthy diet contains all three. The trick is to find the right balance and to know which foods contain which source of calories. Whatever your particular calorie requirements are, protein sources should make up 10 to 35 percent of your diet, fat sources 20 to 35 percent and carbohydrate sources 45 to 65 percent, according to the Dietary Guidelines for Americans 2005.

Protein

Proteins provide the 20 amino acids which make up the cells, tissues and organs of your body. Your body makes over half the amino acids needed, but your diet must provide the rest -- the essential amino acids. Some foods are "complete" sources of protein and contain all the essential amino acids. Animal-based foods are the main sources of complete protein and include meat, fish, poultry, eggs, milk and cheese.

Plant-based foods also contain protein, but are "incomplete" sources of protein, meaning they contain only some of the essential amino acids. These incomplete proteins include nuts and seeds, rice, beans, corn and tofu.