Gentle Metabolism of Keratin, Brightening and Revitalizing Skin: Papaya Enzyme and Papain can gently metabolize dead skin cells on the surface of the skin. Unlike highly irritating acid exfoliating products, it does not damage the skin barrier. Long term use can improve the dullness and roughness of skin caused by keratin accumulation, leaving the skin radiant and radiant. It is especially suitable for improving complexion after staying up late, and some people may even feel a significant reduction in closed mouth after use.