Niacinamide is a form of vitamin B3. Applied to the skin, it helps strengthen the skin barrier so skin holds moisture better, calms redness, helps regulate oil, makes pores look less obvious and can gradually fade dark spots. It is one of the gentlest active ingredients, works for most skin types, and most products contain 5% or less. Use it once or twice a day after cleansing.
Niacinamide turns up in serums, moisturisers and even cleansers, and it has earned its popularity by being both useful and easy to tolerate. Here is what it can and cannot do, and how to fit it into a good skin care routine.
What Niacinamide Does for Your Skin
| Benefit | How it helps |
|---|---|
| Stronger skin barrier | Supports the layer of oils and water that locks in moisture and keeps irritants out, so skin feels less dry and sensitive |
| Less redness | Eases inflammation, which can calm redness linked to spots, and soothe skin irritated by retinol or exfoliating acids |
| Oil control | May help regulate how much oil skin produces, which can mean fewer clogged pores |
| Smaller-looking pores | Nothing shrinks pores permanently, but smoother, clearer skin makes them less noticeable |
| More even tone | Can lighten dark spots gradually; research has looked mainly at formulas with around 5% |
| Softer fine lines | May improve fine lines and sallowness over time by supporting hydration and elasticity |
These effects are summarised by Cleveland Clinic. Two of the best-known studies are a 2002 trial in the British Journal of Dermatology, in which 5% niacinamide reduced facial pigmentation, and a 2006 study in which 2% niacinamide lowered facial oil production.
Who Is Niacinamide Good For?
Oily and Combination Skin
Helps balance shine and keep pores clearer. It fits easily into a skincare routine for oily skin.
Spot-Prone Skin
Calms the redness around breakouts and is gentle enough to use alongside other spot treatments.
Uneven Tone
A steady, gentle option for dark marks left by spots or sun, with patience over several weeks.
Dry or Sensitive Skin
Its barrier support can help, but start with a low strength and patch test first.
How to Use Niacinamide
- Pick a sensible strength. Most products contain 5% or less, which is all most people need. Higher is not automatically better.
- Patch test on your forearm and wait 24 hours if you have sensitive skin.
- Apply after cleansing, once or twice a day, as a serum or within your moisturiser.
- Finish with moisturiser and, in the morning, SPF 30 or higher. Fading dark spots is pointless without sun protection.
- Give it time. Expect to wait a couple of months for changes in tone or texture.
What to Pair It With
Pairs Well
Hyaluronic acid, ceramide moisturisers, antioxidants including vitamin C, retinol and glycolic acid. Its soothing effect can make stronger actives easier to tolerate.
Possible Side Effects
Rare, but can include itching, mild burning, redness or an allergic reaction. Stop using it if your skin reacts.
The vitamin C myth: you may read that niacinamide and vitamin C cancel each other out. Cleveland Clinic lists vitamin C among the ingredients niacinamide pairs well with, and many modern formulas combine the two.
A Niacinamide Serum to Try
Tranexamic Acid 2.5% & Niacinamide 4% Brightening Serum by SkinChemists
A lightweight, non-greasy serum pairing 4% niacinamide with 2.5% tranexamic acid, another ingredient used to target dark spots, plus glycerin for hydration. The brand designed it to even out tone and improve texture. Use it after cleansing and follow with moisturiser and daily SPF.
View ProductFrequently Asked Questions
Can I use niacinamide every day?
Yes. Niacinamide is gentle enough for once or twice daily use for most people. If your skin is sensitive, start once a day.
What percentage of niacinamide is best?
Most products contain 5% or less, and much of the research used around 2% to 5%. Higher strengths are more likely to irritate without clear extra benefit.
Can niacinamide be used with retinol?
Yes. Niacinamide is often paired with retinol and may help reduce the irritation retinol can cause.
How long does niacinamide take to work?
Skin may feel more comfortable within weeks, but visible changes in oiliness, tone or dark spots usually take a couple of months of regular use.
Sources: Cleveland Clinic, Niacinamide: what it is and its benefits for your skin; Hakozaki T et al., The effect of niacinamide on reducing cutaneous pigmentation, British Journal of Dermatology, 2002; Draelos ZD et al., The effect of 2% niacinamide on facial sebum production, Journal of Cosmetic and Laser Therapy, 2006.