La Prairie's Cellular Serum Platinum Rare has extraordinary properties. Just a few precious drops of this ingenious rejuvenating serum helps maintain the skin's balance for truly age defying results. The skin's natural moisture barrier is restored, so hydration and protection are enhanced. That's just the beginning. Tensing agents, a skin brightening complex and potent antioxidants result in skin that is firmer, brighter, rejuvenated. Agelessly beautiful.