In a double blind, placebo controlled, multicenter trial of L-Lysine supplementation, the group receiving 1000mg of L-Lysine daily for six months experienced an average of 2.4 fewer herpes simplex virus (HSV) infections and their symptoms were significantly reduced.Ingredients:One Capsule Contains: L-Lysine 500mg. GelatinSuggested Use:As a dietary supplement, take 1 to 2 capsules prior to a meal or as directed by your physician.Warnings:Keep out of reach of children.