This cult serum was born in aesthetician Melanie Simon's treatment room, where she applied it during facials. Clients noticed remarkable changes, and began asking to bring home the "magic in a bottle" that visibly brightens and gives skin an incredible luminosity. - 15% Tetrahexyldecyl (THD) ascorbic acid helps promote collagen production, brighten, and repair and prevent damage from UV exposure and other environmental agressors - It’s stabilized composition prevents the product from breaking down from light and air exposure