Contains 20% pure vitamin C in the form of Stay-C 50, which is very active, yet gentle on the skin. It promotes collagen production and good blood circulation, it fights scars and pigmentation and makes the skin strong and healthy. A Bestseller! Can be used safely in the sun because of the high-quality vitamin C. Also contains the Gynostemma anti-aging complex with vitamin E and gingko biloba that enhances the anti-aging effect of this serum.