This serum is formulated using ultra low molecular weight 5KDA Hyaluronic acid with excellent skin permeability for optimal hydration. Beside infusing with Hyaluronic acid, it works to increase your own hyaluronic acid level in the skin, and is clinically proven to provide skin with ultimate hydration as powerful as 10% glycerin.   It is more than just moisture replenishment, this advanced serum delivers potent Hyaluronic acid and hydrating actives deep into skin.