CeraVe Hydrating Hyaluronic Acid Serum is a lightweight serum with a smooth gel texture. It replenishes hydration and locks in moisture while helping to restore and reinforce the protective skin barrier. The formula combines hyaluronic acid, vitamin B5 and 3 essential ceramides. It is fragrance-free, paraben-free and non-comedogenic, and can be used alone, under moisturiser or as a make-up base.