ZO Skin Health 10% Vitamin C Self-Activating10% vitamin C that brightens skin, promoting a more even skin tone and minimizing the appearance of fine lines and wrinkles. 50 ml 1. 7 Fl. Oz. Usage Directions Apply to clean, dry skin AM or PM as the last step in your skincare regimen, before sunscreen or makeup. Key Ingredients Ascorbic acid (10%) Exfoliates skin surface pigmentation for a more even tone and brighter complexion Tetrahexyldecyl ascorbate Stable vitamin c that works to minimize the