SkinCeuticals C + AHA, 1 oz is a dual-action antioxidant serum that combines 15% pure vitamin C with alpha hydroxy acids to brighten, smooth, and protect the skin from environmental stress. Antioxidant protection with vitamin C. Glycolic and lactic acid exfoliate and renew. Improves tone, texture, and radiance. Fights signs of aging and sun damage. Ideal for dull or uneven skin.