Brand New SkinCeuticals Silymarin CF Vitamin C serum for oily and blemish-prone skin 1fl oz/30ml (Full Size) An oil-free vitamin C serum for oily skin and blemish-prone skin that delivers advanced environmental protection, 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.