Tyson L-Lysine Lysinyl 150 Gram. L-Lysine is an essential amino acid that is a necessary component for building protein in the body. It supports Immune Health and it helps Calcium absorption, Collagen formation, and Tissue repair. This is a Pure Free Form L-Lysine with no fillers. *These statements have not been evaluated by the FDA. This product is not intended to treat, prevent or cure disease.