DaVinci Laboratories L-Lysine is a vegetarian dietary supplement supporting the body's antibody, hormone and enzyme functions. L-Lysine is not producted in the body but is an essential amino acid required for human nutrition. It is a basic building block of all protein. L-Lysine supports a natural immune response, natural cell regeneration through normal tissue repair processes, and the building of muscle protein. Recommended usage: As a dietary supplement, take 1 capsule, 1 to 3 times daily between meals, or as directed by your healthcare practitioner.