Say hello to the World's 1st Face Serum with vitamin C, niacinamide, hyaluronic acid, and ferulic acid all in one. The Derma Co. 10% Vitamin C Face Serum works gently to control sebum production, fade acne marks, and tighten skin to prevent fine lines and wrinkles. Dermatologically tested, 10% Vitamin C Face Serum is safe, potent, and clinically proven to reduce acne marks, blemishes, fine lines, and wrinkles.