Obagi Serum Gel — High-Efficacy "All-in-One" Gel with Vitamin C, 80 gUnlike most "All in one" products, this gel provides a greater effect due to a more concentrated composition and new unique development. Vitamin C one of the most effective anti aging remedies. It is a powerful natural antioxidant. Fights all manifestations of photoaging: skin thickening and unevenness, pigmented spots. Also has an anti inflammatory effect. Suppresses melanin production, which promotes skin brightening and gives it radiance.