CeraVe Hydrating Hyaluronic Acid Serum for Face is formulated with our highest concentration of hyaluronic acid, an ingredient that helps retain skin’s natural moisture. Helps skin appear more hydrated and smoother. With Vitamin B5 to help soothe skin. Features CeraVe's patented MVE ingredient-delivery technology to continually release moisturizing ingredients and provide 24-hour lasting hydration. Ceramides are found naturally in the skin and make up 50% of the lipids in the skin barrier. All CeraVe products are formulated with three essential ceramides (1, 3, 6-II) to help restore and maintain the skin’s natural barrier.