15% Niacinamide Serum Benefits: What It Does, Who It’s Best For & How to Use It Niacinamide can support skin hydration, the appearance of uneven tone, and oil control, but research at lower concentrations does not prove that a 15% serum works better. If you are comparing 15% niacinamide serum benefits with 5%, 10%, or … Continue reading 15% Niacinamide Serum Benefits: What It Does, Who It’s Best For & How to Use It