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Why Your Body Needs Protein There are 20 amino acids that humans need for survival and growth. Eleven of these can be synthesized by the human body and are often referred to as nonessential amino acids . The other nine can only be synthesized in small quantities or not at all; these are referred to as essential amino acids . The only way to get the essential amino acids your body needs is to eat foods that contain one or more of them.

The only way to get the essential amino acids your body needs is to eat foods that contain one or more of them.

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Lean Protein for Health