Obagi’s Professional C® Serum 10% is a fast-absorbing serum designed to boost collagen production, even skin tone, strengthen antioxidant defenses, and improve the appearance of fine lines and wrinkles. Formulated with 10% L-Ascorbic Acid, this product works to brighten dark spots and encourage the production of collagen and elastin while providing an impressive level of protection against free radicals and environmental stressors. The effective antioxidant formula helps to brighten uneven tone at the surface and creates a more radiant and youthful-looking complexion with regular use.