REPLENIX Hyaluronic Acid Hydration Serum is an intensely pure, medical-grade, ultra-hydrating serum with fractionated hyaluronic acid that quenches dehydrated, dull skin for a supple, smooth, plump-looking complexion. Visibly reducing the signs of aging, skin appears brighter, firmer, and rejuvenated as skin’s barrier is protected from damaging free radicals.