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When used topically, niacinamide can improve skin hydration by preventing evaporation of moisture from the skin into the environment. It's also a natural anti-inflammatory ingredient, so it's great for calming irritated skin but also good for people with sensitive skin Can niacinamide soap whiten skin? In the clinical studies, niacinamide significantly decreased hyperpigmentation and increased skin lightness compared with vehicle alone after 4 weeks of use. Conclusions: The data suggest niacinamide is an effective skin lightening compound that works by inhibiting melanosome transfer from melanocytes to keratinocytes www.herbicosbeauty.com