Perricone MD ESSENTIAL Fx ACYL-GLUTATHIONE Rejuvenating Moisturizer 30 mL / 1 Oz. A deeply hydrating, fast-absorbing, skin-firming moisturizer that delivers optimal nourishment to strengthen and replenish the skin's moisture barrier for plumper, firmer skin. Provides optimal nourishment to help treat dry, tight skin. Massage onto cleansed face and neck using a gentle upward motion. Use mornings and evenings.