L-lysine is an essential amino acid and as such it must be supplied in the diet – the body cannot synthesise essential amino acids. Amino acids are compounds used by the body for a number of functions including to form proteins. Each capsule of Cytoplan's vegan L-Lysine provides 500mg of L-lysine (the form of L-lysine that is naturally occurring in food). It is an effective treatment for cold sores.
