Niacinamide, izwi kandi nka vitamine B3, ni ikintu gikomeye mu kwita ku ruhu no kumererwa neza. Iyi vitamine ibora amazi ntabwo ari ngombwa kubuzima muri rusange, ariko kandi itanga inyungu nyinshi kuruhu. Byaba bikoreshwa cyane mubuvuzi bwuruhu cyangwa byafashwe mubyongeweho, niacinamide irashobora gufasha im ...
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