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However, the evidence is modest , especially for cosmetic uses like skin-whitening, and the side-effects , while usually mild, must be taken seriously especially in certain populations (asthma, pregnant, on chemotherapy, etc.)

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Common adverse effects include: Nausea and digestive discomfort Skin rash or itching (allergic reactions) Headache A tingling sensation (paraesthesia) in some individuals At higher doses (above 600 mg daily), there is a theoretical risk of reducing blood glucose levels