L Lysine is an essential amino acid that is a necessary building block for all proteins. It is needed for proper growth and bone development in children. L Lysine helps in the collagen formation and tissue repair, and is therefore good for those recovering from surgery and sports injuries as it helps to repair muscle protein. It has also been proven to lowers high serum triglyceride levels. L Lysine is most commonly used for the treatment and prevention of colds sores and mouth ulcers. L Lysine inhibits normal replication of Herpes simplex virus (HSV), shortening the normal course and duration of the disease. L Lysine cannot be manufactured in the body. It is therefore vital that adequate amounts be included in the diet. Sona L Lysine 500mg is made of the highest quality, providing 500mg of L Lysine per tablet.