Niacinamide
A form of vitamin B3 that supports the skin barrier and can improve uneven tone, oiliness and fine lines.
Key facts
Niacinamide at a glance.
Helps with
Barrier support, uneven tone and oiliness
Results
Assess at 4–12 weeks
Skin tolerance
Usually well tolerated
Routine fit
Morning or night
At a glance
Top things to know about Niacinamide
- What it is. Niacinamide is a form of vitamin B3 used to support the skin barrier and improve uneven tone. Studies also suggest modest benefits for fine lines and oiliness. It is usually well tolerated, but results depend on the finished formula.
- What matters. Choose the texture and other ingredients your skin tolerates. A niacinamide percentage alone does not predict the result.
- What it is not. Not an established substitute for acne, rosacea or eczema medication.
- Choosing a formula. Choose for barrier support, uneven tone and oiliness; often the gentler starting point.
More details: strength, timing and precautions
| Bottom line | Choose for barrier support, uneven tone and oiliness; often the gentler starting point. |
|---|---|
| Type | Vitamin B3 (nicotinamide) |
| What it does | Supports the barrier and improves uneven tone |
| Best for | Barrier support; uneven tone; oiliness |
| Studied concentrations | 2–5% |
| When to use | Morning or night |
| Time to results | About 4–12 weeks, depending on the concern |
| Irritation | Usually low; stinging or redness can occur |
| Sensitive skin | Often suitable in a gentle formula |
| Pregnancy | Check the complete formula with your pregnancy clinician |
| Available | Over the counter |
Often used for
What Niacinamide is used for
Barrier Support
Supports barrier lipids and helps reduce water loss in dry skin.
Wrinkles and Fine Lines
A small controlled trial of 5% niacinamide found modest improvement in fine lines.
Uneven Skin Tone
Can improve uneven pigmentation with regular use and sun protection.
Oiliness
2% niacinamide improved some measures of facial oiliness in controlled studies.
Acne
Small trials suggest benefit for inflammatory acne; consider it a supporting option.
Melasma
A small trial of 4% niacinamide found improvement alongside sunscreen.
Rosacea
A niacinamide moisturizer was studied for barrier support; its other ingredients also matter.
Enlarged Pores
Less oil may make pores less noticeable; lasting pore-size reduction is unproven.
Eczema
Barrier benefits do not establish niacinamide as an eczema treatment.
Deep Wrinkles
Fine-line improvement does not establish correction of deep folds.
HOW IT WORKS
How Niacinamide works
Diagram explanation and sources
Supports the skin barrier: Helps skin make lipids that reduce water loss. Reduces pigment transfer: Less pigment reaches neighboring skin cells.
Schematic illustration; not a measurement of skin penetration. Effects vary with ingredient identity and formulation.
Strengths
Niacinamide strengths
Clinical studies commonly use 2–5% niacinamide for particular concerns. Higher marketed strengths are not a proven upgrade for everyone.
2%
4–5%
10%
Controlled studies tested a finished formula for measures of facial oiliness; results do not mean every oily skin needs niacinamide.
Different trials studied pigmentation, melasma or fine lines. The concern and finished formula matter.
Available in skincare, but not established as universally more effective than the lower studied strengths.
Choosing a strength: A comfortable 2–5% product is a reasonable place to look when choosing for the studied concerns; evaluate the complete formula.
Higher strengths: Higher percentages may sting or irritate some skin. Do not keep increasing the concentration when the product causes discomfort.
Formula matters: Niacinamide is also included in moisturizers without a stated percentage. That does not mean the moisturizer cannot support skin comfort.
Forms
Niacinamide forms
Serum
A light liquid or gel that spreads in a thin layer. Can suit layering; it may not provide enough moisture on its own.
Moisturizer
A finished moisturizing base combining water-binding and softening ingredients. Richness varies from light lotions to heavier creams.
Toner
A watery liquid that spreads easily and layers lightly. Alcohol, fragrance and other ingredients influence stinging or dryness.
Products
Dermatologist picks.
The Ordinary Niacinamide 10% + Zinc 1%
Budget serum.
Paula’s Choice 10% Niacinamide Booster
Mixes into moisturizer.
CeraVe PM Facial Moisturizing Lotion
Niacinamide plus ceramides.
More products (1)
La Roche-Posay Toleriane Double Repair
Gentle daily moisturizer.
How to use it
When to use
Morning or night. Start once daily; twice daily is optional if tolerated.
How to apply
After cleansing, spread a thin layer using the amount on the product label.
Moisturizing
Follow a serum with moisturizer if needed.
Tolerance
Reduce use or stop for persistent stinging, redness or a rash.
If it is not working
Reassess after 8–12 weeks. Persistent acne, melasma or an inflamed rash may need different treatment.
Sun protection
Use broad-spectrum SPF 30 or higher each morning, especially when treating uneven pigmentation.
What to expect
First few weeks
Assess comfort. Moisturizer benefits may appear before changes in tone or lines.
4–8 weeks
Oiliness or uneven pigmentation may begin to improve.
8–12 weeks
Reassess tone and fine lines; expect modest changes.
3–6 months
Continue if it helps and remains comfortable.
6–12 months
Long-term benefit is less well defined than short-term results.
What it pairs with
| Ingredient | Use | What to know |
|---|---|---|
| Retinol | Can pair | They can be used in the same routine if tolerated. A gentle moisturizer supports comfort, but niacinamide does not guarantee prevention of retinol irritation. |
| Vitamin C | Can pair | Finished products can be used in the same routine if comfortable; separate them if the combination stings. |
| Exfoliating acids | Use care | Introduce one new product at a time and reduce frequency if the combined routine irritates. |
Alternatives
Alternatives
Azelaic acid
Does more for both acne and dark marks. Niacinamide is gentler and easier to layer with everything else.
Vitamin C
Stronger on dullness and pigment, but far less stable and more likely to sting.
Zinc, taken by mouth
Sometimes suggested for the same problems. The evidence is weaker and the stomach upset is common.
Safety and cautions
Common reactions
Stinging, redness, dryness or a rash can occur. Fragrance, preservatives and other ingredients may also contribute to a reaction.
When to stop
Stop for persistent burning, swelling or an itchy rash. Seek urgent help for trouble breathing or rapidly worsening facial swelling.
Sensitive or inflamed skin
Choose a gentle formula and test a small area. Barrier-support claims do not mean every product suits rosacea or eczema.
Pregnancy & breastfeeding
This topical ingredient is not a retinoid. Review the complete product with your clinician; do not assume every combination formula is suitable.
Important limits
Niacinamide supports skincare; it does not replace diagnosis or established treatment of persistent acne, melasma or an inflamed rash.
Questions
Questions you might be asking.
Does niacinamide help fine lines?
There is clinical evidence, including a small 12-week controlled trial of a 5% moisturizer. Expect modest improvement; it does not erase deep wrinkles.
Is 10% better than 5%?
Not necessarily. Many clinical studies used 2–5%, and a higher concentration is not proven to work better for every concern.
Can niacinamide treat acne by itself?
Small trials suggest benefit, but the evidence is limited. Persistent, painful or scarring acne needs an established acne treatment plan.
Does niacinamide permanently shrink pores?
That has not been established. Less oil or a smoother appearance can make pores look less obvious without permanently changing their structure.
Why does my niacinamide product sting?
The concentration, other ingredients or your skin barrier may be responsible. Reduce use or stop if irritation persists; you do not need to push through it.
Sources
Sources and further reading
Research updated 2026-10-25. Evidence grades reflect confidence in a specific benefit, not its size.
- Niacinamide and aging facial skin
- Niacinamide and pigmentation
- Niacinamide and barrier lipids
- 4% nicotinamide and inflammatory acne
- 2% niacinamide and facial oil
- 4% niacinamide and melasma
- Niacinamide moisturizer in rosacea
- The 500 Dalton rule
- Niacinamide delivery
- NIST Chemistry WebBook
- American Academy of Dermatology
- Manufacturer example: 10% niacinamide product
Related
Keep exploring.
Azelaic Acid
Vitamin C
Acne
Melasma
Rosacea
Azelaic Acid vs Niacinamide
Niacinamide vs Vitamin C
Adapalene vs Niacinamide
Alpha Arbutin vs Niacinamide
Benzoyl Peroxide vs Niacinamide
Green Tea Extract vs Niacinamide
