L-Lysine is an essential amino acid, meaning it cannot be synthesized by the body and must be obtained through diet or supplementation. This formulation provides a double strength dose of L-Lysine Hydrochloride to support the body's functions. As an essential component for protein formation, L-Lysine plays roles in calcium absorption, collagen production, and the formation of hormones and enzymes. It is commonly utilized to support immune function and overall wellness.