Niacinamide (vitamin B3) can reduce itching, fight bacteria, calm redness, protect from sun damage, control oil production, and even out skin tone—but the strength of these effects depends on how much is in the product. The research shows it works safely on skin, though scientists say more real-world testing is needed to fully confirm how well it treats specific skin conditions.

This was a literature review where researchers examined existing published studies on niacinamide to understand how it works on skin and what it actually does when applied topically.

Funding not disclosed in abstract