SOLARAY L-Lysine 500mg | Amino Acid | Healthy Cognitive, Immune System & GI Function, Bones, Joints & Skin Support | 120 VegCaps

Customers find this lysine supplement effective against cold sores, with one noting it works at the first tingle of symptoms. Moreover, the product receives positive feedback for its quality, ease of swallowing, and good price point. However, several customers mention the supplement has an unpleasant smell.