SkinCeuticals was one of the first to popularize the vitamin C ... E, and ferulic acid combo, and we’re not afraid to say that its formula still reigns supreme. “This tried-and-true serum ...
Why We Love It: This vitamin C serum ... L-ascorbic acid can't reach the deeper layers of the dermis without a supporting cast of hydrators and antioxidants, like vitamin E, ferulic acid, vitamin ...