Optimum Nutrition, GLUTAMINE POWDER 300 GRAM, 5000 mg, 10.5 ozProduct Description Glutamine is the most abundant amino acid in the body and plays an important role in muscle. During prolonged periods of intense exercise glutamine levels can be depleted which may limit protein synthesis. Our Glutamine Powder is a simple way to supplement your diet with this amino acid. Just one table spoon of Glutamine Powder provides more glutamine than 4 jumbo eggs, 4 oz. of lean beef, cup of soybeans or a 4 oz. chicken breast.