Neutrogena Hydro Boost Hyaluronic Acid Serum is a unique formula with bursting hyaluronic pearls delivering our most concentrated hydrating serum yet. Infused with glycerin that delivers moisture 9 cell layers deep into the outer layer of the skin to reveal smooth and supple skin. This lightweight hyaluronic acid serum contains 17% hydration complex that quickly absorbs into your skin. Infused with micro + macro hyaluronic acid to hydrate deeper into the skin surface while pro-vitamin B5 and prebiotic technology help boost skin renewal and recovery for healthy looking skin.