Complete, incomplete and complementary proteins

• A complete protein source—from animal proteins such as meat, poultry, fish, milk, cheese and eggs—provides all of the essential amino acids.
• An incomplete protein—from vegetable proteins like grains, legumes, nuts, seeds and beans—is low in one or more essential amino acids.
• Complementary proteins are two or more incomplete protein sources that together provide all of the essential amino acids your body needs. For example, rice and dry beans are each incomplete proteins, but together they provide all of the essential amino acids.
• Do complementary proteins need to be eaten in the same meal?  Research shows that your body can combine complementary proteins that are eaten within the same day.
• Why are complete and complementary proteins important? Complete and complementary proteins that provide all of the essential amino acids will fill you up longer than carbohydrates because they break down more slowly in the digestive process.