Niacinamide is a useful all-rounder for skin that looks shiny, uneven or easily unsettled. This form of vitamin B3 can support the skin barrier, help balance oil and gradually improve the appearance of uneven tone. The best results come from choosing a comfortable formula and using it consistently, rather than chasing the highest percentage.
Here is how to decide whether it belongs in your routine, what to pair it with and when to expect a change.
What is niacinamide?
Niacinamide, also called nicotinamide, is a water-soluble form of vitamin B3. In skincare it appears in serums, moisturisers, cleansers and masks. It is different from an exfoliating acid: its main appeal is supporting several everyday skin functions without needing a peeling step.
Think of your skin barrier as a brick wall. The outer skin cells are the bricks and the surrounding fats are the mortar. Research has found that topical niacinamide can support production of these protective fats, including ceramides, and reduce water loss from dry skin. Read the barrier study by Tanno and colleagues.
What does niacinamide help with?
Oiliness and the appearance of pores
Niacinamide may help reduce excess shine. A clinical study of a 2% niacinamide moisturiser found improvements in oil measurements, although the findings differed between the groups studied. It is a useful supporting ingredient for oily skin, rather than a reason to strip away every trace of oil. Pores may look less noticeable, but they do not permanently close. See the sebum study.
Uneven tone and post-blemish marks
Melanin is the pigment that gives skin its colour. Niacinamide can help reduce the transfer of pigment packages between skin cells. Clinical research has found improvement in hyperpigmentation, meaning darker patches, with topical niacinamide. This makes it a sensible option for some flat brown marks after blemishes; indented acne scars need a different approach. Daily sunscreen remains central to managing uneven tone. Read the pigmentation research.
Dryness and everyday skin comfort
A niacinamide-containing moisturiser can be helpful when skin feels tight as well as shiny. Oily skin can still lose moisture. Choose the whole formula for your skin: a richer cream may suit dry skin, while a lighter serum or gel-cream may feel better on an oily T-zone.
Which niacinamide strength should you choose?
Studies have found benefits with concentrations of 2–5%, so a high percentage is not essential. A 10% serum is another option if the complete formula suits your skin. The percentage alone cannot tell you whether a product will feel comfortable or work better for you.
Medik8 Niacinamide Peptides combines 10% niacinamide with 3% Crystalide peptide, 1% zinc PCA, N-acetyl glucosamine and hyaluronic acid. It is a lightweight, emulsion-based serum aimed at oily, congested or blemish-prone skin. Apply after cleansing and before moisturiser, following the product directions. See Medik8’s formulation and application guidance.
How to introduce niacinamide
- Check whether your existing moisturiser or serum already contains it. One well-chosen product may be enough.
- Patch test first. For Medik8 Niacinamide Peptides, allow at least 24 hours before first use.
- Start a few mornings a week, then increase towards daily use if comfortable. Twice-daily use is optional, not a target everyone needs.
- Keep moisturiser in your routine and finish mornings with broad-spectrum SPF 30 or higher.
Medik8 Advanced Day Ultimate Protect SPF 50+ is a moisturising sunscreen option. Apply generously as directed and reapply during outdoor exposure, particularly after sweating or swimming. Clothing and shade also matter.
What can you use alongside it?
Niacinamide can sit alongside vitamin C and vitamin A skincare. Follow each product’s layering guidance and introduce one new active at a time. If you already use an exfoliating acid or retinal, keep its frequency steady while you test the new serum. A comfortable routine is more useful than adding every ingredient at once. For more on its serum partner, read our guide to peptides in skincare.
For an occasional hydration boost, the Dr Motox Face & Neck Sheet Mask contains niacinamide, sodium hyaluronate and hydrolysed collagen. It is suitable across dry, oily and sensitive skin types. Patch test, use for 15–20 minutes and avoid infected, broken or actively inflamed skin. After a procedure, follow your practitioner’s advice before restarting masks or serums.
How long do results take, and who should take care?
Judge gradual changes over roughly 4–12 weeks. Studies have assessed pigmentation after four weeks and broader appearance changes over twelve weeks; your formula, concern and consistency all influence the timeline. There is no planned downtime with ordinary cosmetic use. If a product causes persistent stinging, itching, redness or peeling, stop and simplify your routine.
Wait until an active skin flare settles before adding a new serum, and avoid any formula containing an ingredient you are allergic to. Persistent acne, worsening redness or a new or changing pigmented mark deserves assessment rather than another cosmetic product.
Niacinamide FAQs
Can I use niacinamide every day?
Yes, if your skin tolerates the formula. Introduce it gradually and follow its directions.
Should I use it in the morning or at night?
Either works. Choose the time you will remember, with sunscreen as the final morning step.
Do I need a separate niacinamide serum?
Not necessarily. If your existing routine already contains it and meets your goals, another layer may add little.
Will it clear acne on its own?
It can support blemish-prone skin, but painful, persistent or scarring acne often needs targeted medical treatment.
Further reading
Bissett and colleagues: 12-week trial of 5% niacinamide · Medik8: niacinamide product and pairing guidance · NHS: sunscreen and sun safety
