Perricone MD Essential Fx Acyl Glutathione Deep Crease Serum, 1 fl. oz. Macy's Perricone MD Essential Fx Acyl Glutathione Deep Crease Serum, 1 fl. oz. Macy's ESSENTIAL Fx ACYL GLUTATHIONE Deep Crease Serum Perricone MD Essential Fx Acyl Glutathione Deep Crease Serum 1 oz For your skin's smoothing needs Essential Fx Acyl Glutathione Deep Crease Serum is highly potent with a silky, luxurious texture that absorbs quickly to smooth the look of even the most stubborn, deep set