La Roche-Posay Hydraphase Intense Serum delivers deep, 24-hour hydration to soothe and visibly plump dehydrated, sensitive skin. Its formula features fragmented Hyaluronic Acid, which absorbs up to 1,000 times its weight in water, to immediately infuse the skin with moisture. Combined with Arginine, Serine, and antioxidant-rich La Roche-Posay Thermal Spring Water, this refreshing, fast-absorbing gel serum helps smooth the appearance of fine dehydration lines. The skin is left feeling soft, supple, and restored. This paraben-free formula is tested on sensitive skin for optimal tolerance.