10% Vitamin C and Astaxanthin Serum. This serum contains a stabilized and powerful form of Vitamin C that stimulates the synthesis of collagen, fights the signs of photoaging, and evens skin complexion. It is combined with Astaxanthin, an antioxidant algae extract known for its red colour and Hyaluronic Acid. Texture is fresh, hydrating and fast-absorbing! It doesn’t irritate or dries out my skin and I use it in combination with the Niacinamide Serum for a glowy, plumped and spot free skin!