Hydroquinone is a skin-lightening agent. It bleaches the skin, which can be helpful when treating different forms of hyperpigmentation. Historically, there’s been some back-and-forth on the safety of hydroquinone. In 1982, the U.S. Food and Drug Administration recognized the ingredient as safe and effective Trusted Source. Several years later, concerns about safety prompted retailers to pull hydroquinone from the market. The FDA went on to discover that many of the products in question contained contaminants like mercury. They established that these contaminants were behind reports of adverse effects. Since then, the FDA has confirmed that hydroquinone can be safely sold over the counter (OTC) in 2 percent concentrations. which Cos De BAHA has prepared for a long time. Now, check for yourself the effects of improving the texture of your skin. Made in S.Korea.