Yes, Vichy Minéral 89 is a serum. It's a lightweight, fast-absorbing formula with hyaluronic acid and Mineralizing Water to hydrate and fortify the skin. It's designed to be applied after cleansing and toning, but before moisturizing. Vichy Mineral 89's gel-like texture melts into the skin leaving it feeling smooth, plump, and radiant. It's suitable for all skin types, including sensitive skin.