This lightweight concentrate boosts the level of Hyaluron that is naturally produced in the body, to rehydrate parched and stressed skin. Hyaluron stores moisture in the skin by forming structures holding up to 99% water for increased hydration. Applied under the Eve Lom TLC Radiance Cream, the active ingredient in the serum increases the effectiveness of the vitamin C, maximizing the anti-oxidant effect for more radiant, younger-looking skin. Eve Lom Women's Intense Hydration Serum A great designer gift. Shop Eve Lom at Barneys New York.