Walk into any Boots, Superdrug or online skincare aisle in the UK and you'll see niacinamide on more labels than almost any other active. It's in £6 serums and £80 ones, in cleansers, moisturisers and spot treatments. It has become the ingredient brands reach for when they want a formula to do several jobs at once — and for once, the hype has real science underneath it.
Here's what niacinamide actually is, what it genuinely does for skin, and exactly where you'll find it in the REFORM Skincare range.
What is niacinamide?
Niacinamide is the water-soluble, active form of vitamin B3. Chemically it's known as pyridine-3-carboxamide, or nicotinamide, and it's one of eight B vitamins. Your body produces it naturally when you take in more niacin than you need, converting it from foods such as whole grains, meat, fish and milk.
In skincare, it's a leave-on active, typically formulated between 1% and 10%. It's worth knowing that niacinamide is not the same as niacin (nicotinic acid). Niacin can cause flushing and redness; niacinamide doesn't have those vasodilating properties, which is precisely why it's so well tolerated on skin — no sting, no burn, no itch in most people.
It's also worth separating it from the trendy actives it often sits beside. Niacinamide isn't an exfoliant like glycolic or salicylic acid, and it isn't a retinoid. It works in a quieter way: supporting the skin's own machinery rather than stripping or resurfacing it.
What are the benefits for skin?
There's a reason dermatologists have used niacinamide clinically for decades. The research points to several distinct mechanisms, and they add up to a genuinely multi-tasking ingredient.
It strengthens the skin barrier. This is the headline benefit. Niacinamide boosts the production of ceramides — the lipids that hold your skin's barrier together. A stronger barrier means less moisture escaping (what dermatologists call transepidermal water loss) and better defence against pollution, weather and irritants. For anyone dealing with dryness, sensitivity or a compromised barrier, this is the foundation everything else sits on.
It regulates oil and sebum. Niacinamide helps balance sebum production without stripping the skin. Interestingly, studies suggest it's more effective on oily skin types than non-oily ones, and this is where concentrations around 2–4% have shown particular promise. Less excess oil means less shine and, often, fewer blocked pores.
It reduces redness and inflammation. Niacinamide has well-documented anti-inflammatory action. That makes it useful for rosacea-prone skin, post-blemish redness and generally reactive complexions.
It helps fade pigmentation and dark spots. Niacinamide interrupts the transfer of melanin from melanocytes to the surrounding skin cells, which helps even out tone over time. It's typically paired with sun protection for best results — nothing brightens skin if UV exposure is undoing the work daily. Concentrations around 4–5% have shown particular efficacy here.
It minimises the look of pores and refines texture. Regular use is associated with smoother skin, reduced roughness and a less noticeable appearance of enlarged pores. This is largely a consequence of better oil control and barrier function rather than any resurfacing effect.
It has antimicrobial activity. Niacinamide has demonstrated action against acne-causing bacteria, which is part of why it features so heavily in blemish-focused formulas.
It's compatible with almost everything. This is the underrated benefit. Niacinamide plays well with vitamin C, hyaluronic acid, retinol, exfoliating acids and sunscreen. You don't need to schedule it into a separate slot in your routine or worry about what it clashes with — it layers and pairs easily, which is rare for an active.
It's also suitable for most skin types, including sensitive skin, and non-comedogenic, so it won't clog pores.
How much niacinamide do you actually need?
More isn't automatically better. Low concentrations of 1–2% are effective for barrier support and hydration. The 4–5% range is a solid all-rounder for tone and pigmentation. Higher concentrations of around 10% suit oilier, blemish-prone or more tolerant skin targeting stubborn concerns. Above that, the returns diminish and irritation risk rises — which is why REFORM deliberately stays within the 1–10% range and doesn't go higher.
If your skin is sensitive or you're new to actives, start low and build up.
REFORM Skincare products that contain niacinamide
REFORM takes a doctor-formulated, cosmeceutical approach and uses niacinamide across the range at different concentrations for different jobs — not as a marketing add-on, but as a barrier-supporting foundation.
Anti-blemish Crème — 10% niacinamide
The highest concentration in the range. This is the one for oily and blemish-prone skin. It combines 10% niacinamide with 1% salicylic acid to exfoliate and unclog pores, and 1% zinc to target acne-causing bacteria and support healing. Together they work to reduce active blemishes, regulate oil production, calm visible redness and inflammation, and help fade post-inflammatory pigmentation left behind after breakouts.
Intensive Moisturiser — 1% niacinamide
A deliberately low, barrier-first concentration. Alongside niacinamide it contains hyaluronic acid, sodium PCA and glycerin to replenish moisture, plus macadamia seed oil, vitamin E and carnosine to nourish and defend against environmental stressors. The formula is built so the niacinamide supports long-term barrier health rather than delivering a quick hit — a smart choice if your skin is dry, reactive or simply doesn't need a high percentage.
Gentle Hydrating Cleanser
A cleanser-stage formula that keeps niacinamide present in the routine without asking too much of it, suited to daily use on skin that needs hydration without clogging.
You'll also find niacinamide in the Hydrate & Protect Kit, a three-step daily routine built around the Intensive Moisturiser formulation for anyone wanting a straightforward, hydration-led approach.
Where niacinamide fits in your routine
The good news is there's no complicated choreography.
Morning: cleanse, then apply your niacinamide product — a serum or moisturiser — and finish with sunscreen. Sunscreen is non-negotiable if pigmentation is one of your concerns.
Evening: cleanse, then your niacinamide product. If your niacinamide comes in a treatment cream such as the Anti-blemish Crème, apply it at the cream stage.
If you're using a separate niacinamide serum alongside a niacinamide moisturiser, that's fine — the totals stay well within sensible limits given the concentrations involved. Give any new active a few weeks; barrier and tone improvements are cumulative, not overnight.
The bottom line
Niacinamide has earned its place because it does several real things at once — barrier support, oil regulation, redness reduction, tone evening, pore refinement — and does them gently enough to suit nearly everyone. It's one of the few "buzzy" ingredients where the buzz is largely justified.
At REFORM Skincare, it runs through the range at considered concentrations: 10% in the Anti-blemish Crème for targeted blemish and oil control, and a gentle 1% in the Intensive Moisturiser for daily barrier support. Used consistently alongside sun protection, it's one of the most reliable building blocks you can have in a routine.
This article is general information, not medical advice. If you have a diagnosed skin condition or are using prescription treatments, speak to your GP or a dermatologist before changing your routine.
