Long established as the most effective ingredient for treating brown spots. Hydroquinone does not bleach the skin, which is why “bleaching agent” is a misnomer; it can’t remove pigment.
Over-the-counter hydroquinone products can contain 0.5% to 2% concentrations of hydroquinone; 4% (and sometimes higher) concentrations are available only from physicians.
Some concerns about hydroquinone’ssafety on skin have been expressed, but despite the controversy, abundant research from reputable sources shows hydroquinone to be safe and effective. If you’re struggling with brown spots or skin discolorations, hydroquinone remains among the best ingredient to treat them.