Niacinamide is a form of vitamin B3, and it is used across a number of different skin conditions — not just for oily skin. Its single most-searched question is whether it genuinely controls oil and breakouts, and the honest answer is: yes, to a real but moderate extent, and that is only one of several reasons it earns its place in a clinical skincare routine.
What Niacinamide Actually Is
Niacinamide is the active, water-soluble form of vitamin B3. In leave-on products it is typically formulated at concentrations of 1% to 10%, and that is the range we work within at REFORM — we do not go higher.
Clinically, niacinamide is used to help regulate oil production, as an anti-inflammatory, and — at higher concentrations — to interrupt the transfer of melanin from the melanosome to the keratinocyte, which is the mechanism behind its role in pigmentation.
Low Percentage vs High Percentage: Why It Matters
Niacinamide's effects are dose-dependent, so the percentage used should match the job.
At lower concentrations — around 2% to 5% — niacinamide is mainly working on barrier support and hydration. It improves ceramide synthesis and reduces transepidermal water loss, alongside a mild anti-inflammatory effect. It is very well tolerated at this range, which is why it suits a cleanser or a barrier-repair moisturiser.
At higher concentrations — around 5% to 10% — the effect on oil regulation and inflammation becomes more pronounced, and this is the range where inhibition of melanosome transfer becomes clinically meaningful for pigmentation. In one direct comparative study, 4% niacinamide was compared with 4% hydroquinone in melasma and produced an equivocal improvement — a reasonable result against a treatment considered a gold standard, and niacinamide was the better-tolerated of the two. At this higher end there is a slightly greater chance of transient flushing, tingling, or mild irritation in sensitive individuals, although niacinamide's irritancy profile remains very low compared with retinoids or acids.
What the Evidence Actually Shows
In acne vulgaris, niacinamide reduces oil production to a meaningful degree and, as an anti-inflammatory, improves acne-induced erythema and the red-scar stage that follows inflamed breakouts. It is also genuinely useful for acne-induced hyperpigmentation, again through its effect on melanin transfer.
In melasma and other pigmentation, niacinamide has a real role, but pigmentation is never solved by one ingredient. In our experience it needs to sit alongside glycolic acid, mandelic acid, vitamin C, retinol, and something to restore the skin barrier — used in combination, not as substitutes for one another.
Where I want to be honest about limits: niacinamide is heavily promoted online for acne, and that promotion often overstates it. It has a genuine place, but it is one part of an ingredient profile — not a stand-alone fix.
Who It Suits — and Who Should Be Cautious
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Rosacea: niacinamide is a suitable, well-tolerated option. I still consider L-ascorbic acid (vitamin C) the stronger choice for preventing redness and interrupting the rosacea inflammatory cascade — but for patients whose skin is too irritated to tolerate vitamin C initially, niacinamide is a good place to start.
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Pregnancy: niacinamide is considered safe.
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Retinoids: it does not interact with retinoids and can be used alongside them.
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Vitamin C: I don't layer niacinamide with L-ascorbic acid in the same formulation — I choose one or the other in a given step of the routine.
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Barrier-compromised, dry, or postmenopausal skin: well suited. It is well tolerated generally and does not raise the irritancy profile of a routine.
Why REFORM Uses Niacinamide — and How
We include niacinamide across the REFORM range, at different concentrations for different jobs:
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Gentle Hydrating Cleanser — for very sensitive or barrier-compromised skin: postmenopausal skin, eczema, psoriasis, or simply dry skin.
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Intensive Moisturiser — combined with hyaluronic acid to help restore the skin barrier. It hydrates without clogging pores, which makes it suitable for eczema, psoriasis, sun-damaged skin, and postmenopausal patients — whose skin often becomes markedly drier and less able to hold moisture once oestrogen falls, and whose pre-menopausal oil-free moisturisers stop being enough.
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Anti-Blemish Cream — 10% niacinamide, our highest concentration. It's formulated for acne-prone skin, but we also genuinely use it for pigmentation more broadly — both acne-induced hyperpigmentation and melasma.
For anti-ageing and for calming rosacea-related redness, I still consider L-ascorbic acid the superior choice. For pigmentation, we use both: vitamin C as an antioxidant, and niacinamide — at a higher percentage — for its direct effect on melanin transfer.
How to Introduce It Safely
A patch test is not necessary. Niacinamide is used daily, but not in the same application as vitamin C — the two are kept separate rather than combined.
Takeaway: niacinamide absolutely has a place in a skincare routine, but like most ingredients championed online it is sometimes oversold — it is one useful part of an ingredient profile, particularly for acne vulgaris, acne-induced erythema and scarring, and acne-induced hyperpigmentation, rather than a be-all and end-all on its own.
