SIZE: 5ML Recharge your skin's natural radiance with this dynamic C.E.O. 15% Vitamin C Brightening Serum from Sunday Riley. Crafted with 15% advanced, stable vitamin C, this antioxidant formula works to target dark spots, dullness and signs of aging, revealing firmer and plumper skin. Key Ingredients: Vitamin C (15% THD Ascorbate): features superior visible brightening, clarifying, and antioxidant properties; helps fight the first signs of aging caused by stress, lifestyle, sun, and pollution Phytosterols Complex: isolated from soybeans and containing at least 40 percent beta-sitosterol, it helps reduce the look of redness and skin sensitivity Saccharide Isomerate Extract: reduces the appearance of pores while reinforcing the skin's natural moisture barrier for smooth, supple texture Glycolic Acid: Provides mild refinement to the skin; maintains the pH of the serum for maximum vitamin C efficacy, while supporting natural cell turnover and glow of the skin Tips: For enhanced visible brightening, follow with Good Genes, CEO Protect + Repair Cream or Tidal Brightening Enzyme Water Cream.