Nature’s Bounty L-Lysine 1000 mg is a dietary supplement that provides an essential amino acid crucial for various bodily functions. Since the human body cannot produce L-Lysine, it must be obtained through diet or supplementation. Necessary for the synthesis of collagen, supporting skin integrity and tissue maintenance.  Supports the immune system, aiding in the body’s defense mechanism. Facilitates the absorption of calcium, contributing to bone health.