Dermalogica Circular Hydration Serum is a hydrating facial serum for all skin types. Start your skin's hydration cycle with the new Circular Hydration Serum. Dermalogica that provides immediate hydration, nourishing skin from within and helping prevent future moisture evaporation. An all-round hydrating serum, it uses an enhanced form of hyaluronic acid to penetrate the skin's surface, providing deep hydration and more elastic, radiant skin over time. Circular Hydration Serum's hydrating matrix, infused with algae extracts, provides fast and long-lasting hydration. Polyglutamic acid from fermented soy replenishes skin's moisture reserves from within.