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The best ingredients in skincare products to treat hyperpigmentation include vitamin C, retinol, and kojic acid.

If you live on TikTok these days, odds are you've heard about kojic acid. What first started as a tip from an influencer about using kojic acid soaps to lighten underarms has turned into a full-blown ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." To get the full low-down on kojic acid, I chatted with dermatologists Shereene Idriss, MD, and ...