Ideal for those who follow a vegetarian or vegan diet, our Lysine 500mg supplement contains the essential amino acid L-Lysine hydrochloride. It’s mainly found in animal proteins and is needed for the production of carnitine, which is important for energy and metabolising fats. As those who follow a vegan diet can be deficient in this essential amino acid, we’ve ensured our formula is free from animal products and can also be used to help prevent cold sores.