Cell Protection Serum strengthens the skin's barrier by replenishes critical lipids lost from intrinsic aging and following clinical procedures. Balanced to identify with the skin’s natural epidermal environment, this ultra-light and nourishing formula drenches the skin in humectants, ceramides, antioxidants, and other age-fighting nutrients. This protects skin cells and combats the aging effects of free radical damage and daily lifestyle imbalances.