Niacinamide: what it does and who it’s for
5 min read · Updated
In short
Niacinamide (vitamin B3) is a well-tolerated cosmetic active that supports the skin barrier, helps balance visible oil and softens the look of uneven tone. Most people do well with a 2–5% serum once or twice a day, layered before moisturizer. Introduce it on its own, patch-test first, and give it eight to twelve weeks before judging results.
Niacinamide (vitamin B3) is one of the most versatile cosmetic ingredients: it supports the skin barrier, helps regulate visible oil, and can soften the look of uneven tone.
It’s generally well tolerated and pairs comfortably with most routines, which is why Mira frequently surfaces it for hydration, oiliness, and pigmentation concerns.
How to use it: a 2–5% serum once or twice daily after cleansing and before moisturizer. That is the range most studies use; 10% isn’t necessarily better and stings for some people. Introduce one new active at a time and patch-test first.
This is cosmetic guidance, not medical advice. For persistent concerns, see a dermatologist.
Frequently asked questions
- Can I use niacinamide with vitamin C?
- Yes. The old advice to keep them apart came from unstable, high-heat lab conditions that don’t apply to modern formulas. If your skin is sensitive, use one in the morning and the other at night.
- Does niacinamide help with pores?
- It can make pores look smaller by helping regulate oil and smoothing the feel of the surface. It doesn’t change pore size itself — no cosmetic ingredient does — but less oil and a smoother texture read as smaller pores.
- How long until I see a difference?
- Give it eight to twelve weeks of consistent use. Oil balance often shifts first; tone evens out more slowly. Mira’s re-scan comparison is built for exactly this kind of before-and-after.
- Can it cause a reaction?
- Rarely — flushing or stinging is more common at 10% and above. Start with a lower percentage, patch-test on the jawline for a few days, and stop if irritation persists.
Mira editorial
Cosmetic guidance; not medically reviewed. For persistent or worrying changes, see a dermatologist.