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 Bacterial growth in the presence of two fold dilution series of Download Scientific Diagram Hydroquinone Skin Lightening Cream: The Ultimate Guide to Brighter, Even Toned Skin Hydroquinone Vs Glutathione For Skin HT26 glutathione Shower Gel 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,