Many so called whitening pills contain glutathione, hydroquinone, or even unregulated blends, but did you know the FDA has never approved these for skin lightening? High doses may harm your liver, Hydroquinone Vs Glutathione For Skin Glutathione Vs Other Skin Brightening Treatments Explained What is Hydroquinone? And Why is it controversial? , The gold standard for treating these darker patches was a topical skin lightening ingredient called hydroquinone, which works by reducing the