Nine amino acids-histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine-known as the essential amino acids, must come from food. Because we don’t store amino acids, our bodies make them in two different ways: either from scratch, or by modifying others. Protein is made from twenty-plus basic building blocks called amino acids. At least 10,000 different proteins make you what you are and keep you that way. It makes up the enzymes that power many chemical reactions and the hemoglobin that carries oxygen in your blood. Protein is found throughout the body-in muscle, bone, skin, hair, and virtually every other body part or tissue. – Test your protein knowledge! What Is Protein? – The bottom line: choosing healthy protein foods Learn the basics about protein and shaping your diet with healthy protein foods. Protein is an essential macronutrient, but not all food sources of protein are created equal, and you may not need as much as you think.
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January 2023
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