Our bodies need a basic amino acid profile but some aminos are needed more than others. Unable to be naturally produced by the body, Essential Amino Acids must be supplemented by an outside source. One of those is L-Lysine. NOW L-Lysine gives you 500mg in a convenient, vegetarian friendly capsule. L-Lysine is especially important for building muscle, making this supplement perfect for athletes. It's also important for recovering from sports injuries and surgery, and aids calcium absorption. Make sure your body gets the L-Lysine it with NOW L-Lysine.