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Dear Nicki, Which is better: kojic acid or hydroquinone? -M Dear M, In a word: hydroquinone. A study in the Journal of Cosmetic Dermatology reported kojic acid alone is less efficacious than 2% hydroquinone in treating hyperpigmentation (i.e., sun spots, uneven skin pigmentation, and the like). Kojic acid has also been found to be associated with contact Read more »