Murad's Vita-c Glycolic Brightening Serum is a gold-stabilized vitamin C and glycolic acid serum for dramatically brighter, healthier-looking skin. Pollution and Uv light can accelerate skin damage through oxidative (free radical) stress. Vitamin C is a potent antioxidant that supports healthier-looking skin and can help prevent visible skin damage like hyperpigmentation, dullness and uneven tone. Glycolic acid rapidly resurfaces and removes dead, dulling surface cells to reveal more radiant skin and clears the way for vitamin C to penetrate skin more effectively.