What is glutamine? Glutamine, also known as l-glutamine, is an amino acid found in the muscles and transferred by the blood into different organ systems. Glutamine is a building block for making proteins in the body. It's also needed to make other amino acids and glucose. Glutamine powder might …

Amino acids are the building blocks of protein, which helps to repair and build muscle tissue. Amino acids can be found naturally in foods like meats, dairy, and legumes, or they can be taken as supplements. Amino acid supplements are popular among athletes and bodybuilders because they can he …