Niacinamide is a form of vitamin B3 used in skincare to strengthen the skin’s barrier, calm redness, control oil, and even out tone over time. It’s one of the most researched active ingredients in modern skincare, and one of the few that suits nearly every skin type — from sensitive to oily to aging skin.
What niacinamide does for skin
- Strengthens the skin barrier — supports the skin’s ability to make ceramides, the lipids that hold moisture in and keep irritants out
- Regulates oil production — helps normalise sebum output rather than stripping the skin, useful for oily and acne-prone skin
- Calms redness and inflammation — has anti-inflammatory properties that ease visible redness and post-acne marks
- Evens skin tone — interferes with how pigment transfers to the skin’s surface, helping fade dark spots and patchiness over time
- Improves texture and fine lines — longer-term use is linked to smoother texture and reduced appearance of fine lines
None of these effects require very high concentrations — the research consistently points to modest percentages being enough.
What percentage of niacinamide should you use
| Concentration | Best for | What to expect |
|---|---|---|
| 1–2% | Sensitive, reactive, or barrier-compromised skin | Gentle barrier support and hydration; safe for daily use |
| 2–3% | Most skin types, general maintenance | Barrier strengthening, mild oil control, calming |
| 4–5% | Oily skin, uneven tone, early fine lines | The most clinically studied range — proven results for tone, texture, and oil control |
| 10%+ | Rarely necessary | Marketed as “stronger,” but research doesn’t show meaningfully better results past 5%, and irritation risk rises |
If you’re new to niacinamide, start at 2–5% rather than reaching for a high-percentage product — there’s little evidence that going higher works better, and it raises your chance of irritation.
Who should use niacinamide
Niacinamide suits almost every skin type, which is part of why it’s so widely recommended:
- Oily or acne-prone skin — helps regulate oil and calm breakout-related redness
- Dry skin — strengthens the barrier, helping skin hold onto moisture
- Sensitive skin — generally well tolerated even by reactive skin, especially at 1–2%
- Skin with dark spots or uneven tone — reduces the appearance of pigmentation over consistent use
What to pair niacinamide with — and what to be careful with
Pairs well with: hyaluronic acid, ceramides, zinc, peptides, and most moisturising ingredients. It’s considered one of the easiest actives to layer into an existing routine.
Use with some caution alongside: strong exfoliating acids (AHA/BHA) or retinol, since layering multiple actives can increase irritation — especially at higher niacinamide percentages. If you use both, consider applying them at different times of day, or introduce one at a time.
Sun protection still matters. Niacinamide doesn’t increase sun sensitivity the way some actives do, but that’s not a reason to skip sunscreen — daily SPF remains necessary regardless of what else is in your routine.
Is niacinamide good for oily skin?
Yes. Niacinamide helps regulate sebum production, which can reduce shine and make skin less prone to breakouts over time — without over-drying it the way some oil-control ingredients do.
Can I use niacinamide every day?
Yes, at 2–5% it’s generally suitable for daily use, morning and night. Higher concentrations (10%+) may need to start with less frequent use if irritation occurs.
Does niacinamide lighten skin?
It doesn’t lighten skin overall, but it can reduce the appearance of dark spots and uneven pigmentation by limiting how pigment transfers to the skin’s surface.
Can I use niacinamide with vitamin C?
Generally yes in modern, well-formulated products — older concerns about the two cancelling each other out mostly applied to unstable, low-pH vitamin C formulas. If your skin is sensitive, using them at different times of day (e.g., vitamin C in the morning, niacinamide at night) is a safe default.