Dr Dennis Gross Skincare Vitamin C Lactic Oil-Free Radiant Moisturizer new never used in box. An oil-free, non-comedogenic moisturizer that doubles as a serum. Powered by 3 forms of vitamin C plus lactic acid to dramatically brighten, hydrate, and improve visible signs of aging. Antioxidants niacinamide and squalane help strengthen and balance the moisture barrier for visibly firmer, more radiant skin. 1.7 fl. Oz.