SkinCeuticals Silymarin CF Serum is oil-free vitamin C serum formulated specifically for oily and blemish-prone skin types that delivers advanced environmental protection and reduces oiliness, refines skin texture, and visibly improves skin clarity and fine lines. Silymarin CF is a breakthrough vitamin C serum for oily and blemish-prone skin that combines 0.5% silymarin (milk thistle extract), 15% l-ascorbic acid, 0.5% ferulic acid and 0.5% salicylic acid to help prevent oil oxidation that can lead to breakouts, and visible signs of aging. This oil-free formula is clinically demonstrated to reduce oil oxidation by up to 76%, as well as reduce oiliness, refine skin texture, and visibly improve skin clarity and fine lines. 15% pure vitamin C helps neutralize free radicals and protect against oxidative stress while providing visible anti-aging benefits. 0.5% silymarin is shown to effectively prevent oil oxidation. 0.5% ferulic acid neutralizes free radicals and complements the antioxidant benefits of Vitamin C. 0.5% salicylic acid is known to exfoliate skin, refine pores, and reduce breakouts when used at an appropriate concentration.