L'Oreal Paris Revitalift Filler Hyaluronic Acid Anti Wrinkle Dropper SerumDiscover our ultimate anti wrinkle serum, charged with 1. 5% pure Hyaluronic Acid to intensely hydrate skin, smooth and replump wrinkles. This is no ordinary serum; the formula contains two types of Hyaluronic Acid for high performance. Macro Hyaluronic Acid molecules are larger, sit at the top of the skin's surface to boost with hydration. Micro Hyaluronic Acid molecules are smaller and penetrate deeper into the epidermis, to boost from within.