Ultimate anti aging 37% vitamin C L Ascorbic Acid, that is a potent vitamin c Complex to help improve your Collagen, Brighten, Smooth & Improve the Appearance of Aging. Withe the 20% additional Pure Hyaluronic acid serum, along with essential herb extract and minerals. Our L-Aascorbic Acid ( Pure Vitamin C ) serum has been stabilized through triple C Technology & is the most effective Vitamin C serum in the world today.