Zein Obagi. Dermacept C Serum, the high potent anti-aging serum. Loosen stubborn spots, acne scarring along with other aged skin problems such as roughness, wrinkle, sage, etc. together with the innovative penetration, the serum infuse dermis with the extremely focused vitamin C + E and also the effective antioxidant power. Dark spots as well as wrinkles are visibly reduced, pores and tightened, bad acne scares are lightened, skin become smoother and more translucent. How to use: Apply morning and night after face wash and toner cartridge. Lightly squeeze 3-4 drops (for whole face) onto palm and gently use on face with fingertips, particularly to dark or dry locations.