L-Lysine is an essential amino acid that is needed daily for proper protein growth. In high levels, it has been used to decrease frequency and severity of outbreaks that occur on the mouth and/or genitals. Ingredients: L-Lysine (500mg), capsule (vegetable source), cellulose, magnesium stearate (vegetable source) *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.