L Lysine was first introduced into the US back in 1955 as Lysine Hydrochloride. It is an amino acid helps to increase sperm production when combined with Zinc. It also helps to stimulate testosterone production and overall semen quality. L-Lysine
As one of the essential amino acids in the body, lysine is a necessary building block for all protein in the body. It also plays a major role in calcium absorption. The body is unable to manufacture L-Lysine and as such it must be obtained by either diet or supplements.