Most popular amino acid Super convenient, cost-effective solution Help grow and maintain muscle number of items: 1 Arguably the most popular of the 20 amino acids and naturally occurring in protein, which helps to build and repair new muscle1 - it's important for all fitness goals. L Glutamine is an amino acid that the body is only able to make in small amounts, so we must get some from our diet. Naturally found in meat, fish, and eggs, our L-Glutamine Powder is a super convenient, cost-effective solution that can simply be added to your protein shake, with no meal prep required. Comes with unflavoured and in 250 g pack.