L-histidine HCl (hydrochloride) is a variation of L-histidine that is bound to hydrochloride to aid in absorption. L-histidine is an essential amino acid that is used in the biosynthesis of proteins and is involved in many processes in the body. L-histidine HCl supports the joints and cardiovascular health.* It benefits the heart, contributes to healthy skin, and promotes sexual health.** These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.