Herbs of Gold Lysine 1000 + Olive Leaf is a high strength lysine supplement containing a therapeutic dose of lysine assisting immune health. Combined with the powerful anti-viral herb Olive Leaf it works quickly for the effective relief from cold sores. Lysine decreases the frequency of cold sores and reduces the time taken for cold sores to heal. Lysine provides relief from symptoms of cold sores as well as decreasing the severity of symptoms associated with cold sores. If symptoms persist consult your healthcare practitioner.