Peel off skin discolorations and spots with the MBP Yellow Peeling Oil. Whether you have skin problems such as dark knuckles, hands or feet, MBP Yellow Peeling Oil contains Glycolic Acid, and Lactic Acid that works by intensively exfoliating dead skin cells while accelerating the formation of new cells. What this means is that it simply peels off the skin! Peeling usually start from the 4th or 5th day of usage.