What Does Niacinamide Do for Skin?
Last Updated: February 2026 · 3 min read
Niacinamide (Vitamin B3) is a multi-tasking ingredient that strengthens your skin barrier, reduces pore appearance, controls oil production, fades dark spots, and calms redness. It's one of the few actives that works for every skin type and pairs safely with virtually every other ingredient. Use 5% niacinamide serum morning and/or evening. It's non-photosensitizing, so no special precautions are needed.
Key Benefits of Niacinamide
🛡️ Barrier Repair
Stimulates ceramide production, strengthening your skin's protective layer and reducing water loss
⭕ Pore Minimizing
Regulates sebum production and tightens pore walls, making pores visibly smaller over 4–6 weeks
✨ Brightening
Inhibits melanin transfer to skin surface cells, gradually fading dark spots and evening skin tone
🌿 Anti-inflammatory
Reduces redness and calms irritation — particularly beneficial for rosacea and acne-prone skin
How to Use Niacinamide
Concentration: Start at 5%. Only increase to 10% if your skin tolerates 5% for 4+ weeks without flushing.
Timing: Apply after cleansing, before moisturizer. Works AM, PM, or both. Full layering order →
Compatibility: Pairs with retinol, Vitamin C, hyaluronic acid, AHA/BHA — no conflicts.
Timeline: Expect visible pore and oil results in 4–6 weeks. Brightening results in 8–12 weeks.
See niacinamide and 30+ other ingredients in our ingredients glossary.
Frequently Asked Questions
2–5% for sensitive skin, 5% for most people, up to 10% for oily/acne-prone skin. Higher isn't always better — concentrations above 10% may cause flushing or irritation without added benefit.
Niacinamide does not cause purging. Purging only occurs with ingredients that increase cell turnover (retinol, AHAs, BHAs). If you break out after starting niacinamide, you're likely reacting to another ingredient in the product, not the niacinamide itself.
Either or both. Niacinamide is non-photosensitizing, stable in light, and compatible with virtually every ingredient. It works equally well in AM (under SPF) and PM (with retinol). There is no wrong time.
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