Vitamin C 15% Brightening Serum delivers a potent dose of L-ascorbic acid for radiant, even skin. It fades dark spots, brightens dull complexions, and protects against environmental oxidative stress. Formulated at an optimal pH for maximum stability and skin penetration. Lightweight and fast-absorbing, it works well under moisturizer and SPF. A brightening powerhouse serum for those seeking luminous and youthful-looking skin.