Sunday Riley C.E.O. 15% Vitamin C Brightening Serum 30mlUnlock a radiant, glowing complexion with Sunday Riley C. E. O. 15% Vitamin C Brightening Serum. This powerful serum is packed with 15% advanced Vitamin C to help brighten skin, reduce the appearance of dark spots, and provide a smoother, more even tone. The formula is designed to boost radiance, combat dullness, and protect the skin from environmental stressors, leaving you with younger, healthier looking skin. Key Features & Benefits 15% Vitamin C: