Perfect Face Glutathione Super Brightening Serum is an classic whitening serum that can be added to the lotion to boost its effects. It is effective in exfoliating pigmentation, whitening of dark around the Knuckles, Feet, Knees and Elbow. The serum equally hydrates the skin even while taking care of the rough and tough layers of the skin. The resulting out come is giving you a radiant, smooth and glowing skin.