Concentrated Cellular Hydration Barrier Repair Serum with Hexapeptide-9 that repairs skin barrier in just 30 minutes at the cellular level. Murad's Cellular Hydration Barrier Repair Serum repairs skin barrier in 30 minutes to deliver hydration at the cellular level for stronger, healthier skin. Invest in science-backed skincare with the Murad Cellular Hydration Barrier Repair Serum. Powered by Hexapeptide-9, the concentrated formula helps to visibly repair the skin barrier at the cellular level to promote a more even-looking complexion. Rich in omegas 3 and 6, refined bilberry seed oil provides an infusion of fatty acids to encourage a smooth, plumper-looking appearance, while a network of hyaluronic acid molecules forms a protective layer that hydrates and nourishes the skin. The serum promotes visibly stronger, brighter and smoother-looking skin in just one use.