Help your skin bounce back with the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum, an anti-wrinkle concentrate clinically proven to re-plump and repair skin in just one day.Made for dehydrated skin that is showing signs of ageing, the La Roche-Posay Hyalu B5 Hyaluronic Acid Serum harnesses the power of two types of pure hyaluronic acids, vitamin B5 and madecassoside, which work to plump, repair the skin’s barrier and activate skin cell renewal.