L-Lysine (or, simply Lysine, as it is more commonly referred to), is one of nine essential amino acids. Amino acids are, quite simply, the building blocks for. L-lysine mg - MG L-LYSINE - boost testosterone (2 Bottles): Lysine powder by Healthy Supplement may be beneficial for improving numerous health . Lysine is an essential amino acid that plays many important roles in your body. Here are 4 impressive health benefits of lysine.