![]() These are essential only under specific circumstances, such as during illness, pregnancy, infancy, or trauma.įor example, arginine is considered nonessential, but your body can’t make as much as you need when you’re healing from a serious injury or fighting certain diseases, such as cancer ( 4). ![]() Several nonessential amino acids are classified as conditionally essential. This means they are “complete” protein sources ( 2, 3).Īfter you eat protein, your body breaks it down into amino acids and then uses them for various processes, such as building muscle and regulating immune function ( 1). However, some plant foods, such as the soy products edamame and tofu, contain all nine essential amino acids. The best sources of essential amino acids are animal proteins such as meat, eggs, and poultry. These are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.Īlthough your body can make nonessential amino acids, it cannot make essential amino acids, so you have to get them from your diet. ![]() While all 20 of these are important for your health, only 9 are classified as essential ( 1). Your body needs 20 different amino acids to grow and function properly. Amino acids are organic compounds composed mainly of nitrogen, carbon, hydrogen, and oxygen. ![]()
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