Action Chrono 72 hours is an ultra strong concentration which is highly effective in exfoliating pigmentation, whitening of dark spot around the Knuckles, Feet, Knees and Elbow areas. The serum targets the rough and tough layers of the skin and within 72 hours a visible result. With Glutathione and Kojic extracts, Action Chrono 72 hours brightening the skin, and its resulting out come is a radiant, smooth and glowing complexion.