See below: Products containing Azelaic acid or Kojic acid(both natural products) are effective skin lighteners. It's important to use sun protection cream with them if exposed to strong sunlight. Hydroquinone products are effective but there has been some concern over possible toxicity(carcinogenic when fed to mice orally). No evidence of it causing skin cancer in humans. May cause hypo-pigmentation.
Answered 3/28/2016
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A doctor has provided 1 answer
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