Used for skin pigmentation, age spots, lentiges, freckles, melasma and other sun spots etc. HYDROQUINONE has been banned in most countries except in USA. It’s a toxic chemical known to cause cancer in lab animal testing, can cause permanent skin discoloration, permanent blue skin color, irritation, dermatitis etc. This product should not be used. ARBUTIN derived from bearberry also gets converted to HYDROQUINONE in the body and should also be avoided!