Hyaluronic acid is a powerful hydrating ingredient found naturally in your skin. However, as you age, it becomes depleted, which is why you may need to replenish it in order to help prevent dry skin. CeraVe Hydrating Hyaluronic Acid Serum helps bind moisture to your skin?s surface, smoothing it and providing up to 24 hours of hydration. With vitamin B5 and three essential ceramides that work together to lock in skins moisture and help restore your skin?s protective barrier. CeraVe Hydrating Hyaluronic Acid Serum provides your skin with much-needed moisture and more.