Water

Water, listed on labels as aqua, is the most common ingredient in skincare and far more than a filler. It dissolves and carries many active ingredients, gives a formula its texture and spreadability, and delivers immediate hydration that leaves skin feeling refreshed. The balance of the water phase shapes how a serum, cream or cleanser feels as you apply it.

Water forms the base of much of the iS Clinical range. At the Cleanse step, Cleansing Complex and Cream Cleanser rely on it. In the Treat step it carries the actives in serums such as Active Serum, Pro-Heal Serum Advance+, Super Serum Advance+, GeneXC Serum and Hydra-Cool Serum. Moisturizing Complex and Reparative Moisture Emulsion contain it at the Hydrate step, and Copper Firming Mist delivers a refreshing veil between steps. Read more in our guide to water in skincare.