Hyaluronic Acid

Hyaluronic acid is a humectant found naturally in the skin. In iS Clinical formulas it is botanically derived, often as sodium hyaluronate, and it attracts and binds many times its own weight in water. That moisture helps skin look plumper and smoother, softens the look of fine lines caused by dryness and supports the skin's natural moisture barrier.

Because hydration matters at every step, it runs through much of the range. Hydra-Cool Serum and Poly-Vitamin Serum deliver it in the Treat step, joined by Youth Complex, NeckPerfect Complex, C Eye Serum Advance+, Youth Eye Complex and GeneXC Firming Eye Gel for specific areas. To Hydrate, choose Moisturizing Complex, Reparative Moisture Emulsion, Youth Intensive Creme, Brightening Complex or SHEALD Recovery Balm, with Hydra-Intensive Cooling Mask as an extra layer. Body Complex, Youth Body Serum and Youth Lip Elixir take it beyond the face. Read more in our guide to hyaluronic acid.