Niacinamide Serum for Oily Skin: Benefits and Side Effects
Niacinamide (vitamin B3) is used on oily skin mainly because small trials found that a 2% niacinamide moisturizer lowered sebum measures. Side effects are usually mild: tingling, flushing or occasional new bumps. It does not exfoliate, so it will not clear blackheads on its own, and we make no research claim for pores or dark marks.
For the research, the products and prices in one place, see our niacinamide guide.
Key takeaways
- Benefit with evidence: 2% niacinamide lowered sebum excretion in Japanese participants and casual sebum levels in Caucasian participants; effects were modest.
- Common side effects: tingling, flushing, or a few new bumps; patch test first.
- Not an exfoliant: pair it with salicylic acid if you need pore-clearing.
- Start 2 to 3 nights a week, moisturize and use sunscreen daily.
What are the benefits of niacinamide for oily skin?
| Benefit | What we can say |
|---|---|
| Lower sebum | Two small trials of 2% niacinamide measured lower sebum excretion (Japanese, 4 weeks) and lower casual sebum levels (Caucasian, 6 weeks) |
| Acne | A Cochrane review rated the evidence on nicotinamide for acne as low quality |
| Pores and dark marks | Widely marketed, but we have not summarised studies, so we make no research claim |
| Barrier support | Commonly cited; we make no specific research claim |
What side effects can niacinamide cause?
| Side effect | What it usually means | What to do |
|---|---|---|
| Tingling for a minute or two | Skin adjusting, more likely at higher strengths | Use fewer nights or a lower strength |
| Flushing or warmth | A sensitivity to the strength or formula | Pause and restart less often |
| A few new small bumps | May be a reaction or coincidence | Stop the newest product first |
| Itching, swelling or rash | Possible allergy | Stop and see a doctor |
Who should be careful?
- Very sensitive or easily irritated skin: start with a low strength and a few nights a week.
- Anyone with a known allergy to an ingredient in the product.
- Pregnant or breastfeeding: ask your doctor before using any active.
How do you start niacinamide with fewer side effects?
- Patch test for 48 hours.
- Use 2 to 3 drops at night, 2 to 3 nights a week.
- Follow with a light moisturizer.
- Move to nightly use only if skin stays calm.
- Keep sunscreen in your morning routine.
Does strength matter?
The sebum trials used 2%, and an 8-week trial used a 5% gel for acne. Popular serums use up to 10%, but no trial we cite used 10%, and higher strengths make tingling more likely. For a full buying guide, see niacinamide serum in Pakistan. Our Acne & Oil Control Serum combines 10% niacinamide with 2% salicylic acid, which is why we suggest starting slowly.
What does a sample routine look like?
| Step | Morning | Night |
|---|---|---|
| Cleanse | Gentle cleanser | Gentle cleanser |
| Treat | Niacinamide serum, if you use it separately | Salicylic acid or a combined serum, 2 to 3 nights |
| Moisturize | Light gel | Light gel |
| Protect | Sunscreen SPF 30+ | None |
What mistakes do people make with niacinamide?
- Starting at the highest strength.
- Using it as the only treatment for blackheads.
- Layering many actives at once.
- Expecting results in two weeks.
How do you patch test niacinamide properly?
- Apply a small amount behind one ear or on the inner forearm.
- Leave it for 48 hours without washing the spot.
- Check for redness, itching or swelling.
- If clear, use it on a small area of the face for a few days.
- Then use it on the whole face, a few nights a week.
When can you expect results?
| When | What the studies and experience suggest |
|---|---|
| 2 to 4 weeks | The sebum trials measured lower sebum within this window with 2% niacinamide |
| 6 to 12 weeks | A fair time to judge overall comfort and shine |
| Beyond 12 weeks | Keep the routine if skin is comfortable; ask a doctor if acne persists |
Frequently asked questions
Does niacinamide cause breakouts?
Some people report new bumps with a new product. Patch test, introduce it alone and stop if bumps appear.
Is niacinamide safe to use every day?
Many people use it daily once skin tolerates it. Start slowly.
Does niacinamide treat acne?
It is not a proven cure. The Cochrane evidence on nicotinamide for acne is low quality.
Can I use niacinamide with salicylic acid?
Many people do, and some serums combine them. Start slowly.
Is niacinamide safe in pregnancy?
Ask your doctor before using any active product if you are pregnant or breastfeeding.
Sources
- Draelos ZD, Matsubara A, Smiles K. The effect of 2% niacinamide on facial sebum production. J Cosmet Laser Ther, 2006. doi:10.1080/14764170600717704 (PubMed 16766489)
- Liu H et al. Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne. Cochrane Database Syst Rev, 2020. doi:10.1002/14651858.CD011368.pub2
- American Academy of Dermatology. Acne: who gets and causes
A gentle reminder
Skincare helps the look and feel of your skin; it does not treat medical conditions. Patch test any new product behind the ear or on the inner arm first, and introduce one new active at a time. If you are pregnant or breastfeeding, or you have a skin condition such as eczema, ask your doctor before adding active ingredients. See our FAQ for more, or build your own routine.
Related reading: Salicylic acid vs niacinamide.