Grains and legumes are called complementary proteins because when you combine them, you get all of the essential amino acids. Nuts and seeds are also complementary to legumes because they contain tryptophan, methionine and cysteine.

Where are complementary proteins found?

Combinations of complementary proteins includes: Lentils or legumes with grains, nuts/seeds or dairy. Grain foods with dairy products. Dairy with nuts and/or seeds.

Which is the best example of complementary proteins?

Examples of complementary proteins include: Rice and Beans: The most classic example of combining proteins is rice and beans. Rice protein is high in the amino acids cysteine and methionine, but low in lysine. Bean protein is low in the amino acid methionine.