It has the rare distinction of being an active skincare ingredient that works on every skin type. And the benefits of niacinamide are such that it can improve almost any skin issue. And no – there is no catch!

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There are no ‘miracle’ ‘skincare ingredients, but if we had to pick one that we can safely recommend to anyone, it would be niacinamide. Also known as vitamin B3 or nicotinamide (nothing to do with cigarettes, don’t worry), it’s been lurking in your skincare for decades. More of a trusty workhorse than a temperamental show pony such as vitamin C or retinol, it never really captured the imagination until Covid came along. Once we were all riddled with  maskne , that unholy combo of spots and irritation, the multiple, seemingly contradictory benefits of niacinamide truly came into their own. An active that hydrates while minimising oiliness and beats back hyperpigmentation while extinguishing redness and inflammation seemed like a promise too far – but it wasn’t.

So today, the market is awash with niacinamide serums, creams, cleansers and toners: on top of everything else, the ingredient is pH neutral and doesn’t oxidise (go off when paired with the wrong substances), so it’s easily formulated in both water and oil-based products (that is to say, any texture you like).  AND it irritates almost nobody’s skin, even at high concentrations (there are always exceptions! But reactions to niacinamide are rare). Highlighted in our  ‘8 anti-ageing ingredients that actually work’  feature as a "brilliant all-rounder" by dermatologist  Dr Sam Bunting  and a firm favourite of consultant dermatologist Dr Emma Wedgeworth , it’s also a top-class barrier-building ingredient and antioxidant, mitigating environmental damage from free radicals and from UV radiation in particular.

We asked our derms to get under the skin of this hard-working skin vitamin. From exactly how niacinamide works on a cellular level to precisely how to incorporate it into your skincare regime, here's your guide to beauty’s queen B.

How does niacinamide work?

Niacinamide is naturally present in the body, where it’s involved in a LOT of processes that don’t function well without the presence of vitamin B3. It works in a number of ways:

1) Taken as a supplement, certain forms of B3 help restore cellular energy and repair DNA (it is related to NAD+, the molecule that helps convert food into energy  and ensures proper cell function). Topically, it also helps modulate cellular energy*, which may explain why it has such a vast array of benefits. Cellular energy is at the heart of healthy, balanced skin – and if niacinamide does one thing, it’s the balancing out of any issues from a propensity to oily spots all the way to a propensity to dryness and sensitivity.

2) Niacinamide also acts as a powerful antioxidant. According to consultant dermatologist Dr Emma Wedgeworth, doctors sometimes use it in tablet form to help prevent skin cancer, while it has topical sun-protective benefits  as well: it prevents UV suppressing the skin’s immune system and becoming vulnerable to DNA damage.

3) It also, says Bunting, boosts the  skin barrier ., your first line of defence against environmental aggressors, UV, pollution and irritants, which weakens with age and bad habits. “Niacinamide does so by increasing  ceramide  production,” says Bunting. Ceramides are fatty acid derivatives that make up 50 per cent of the uppermost layer of the skin. Like the mortar between bricks (skin cells, in this case), they and other substances like cholesterol and omega fatty acids maintain the integrity of the barrier to as to retain moisture and keep the skin hydrated. Basically, niacinamide is one crucial ingredient for ensuring moisture stays inside the skin and irritants are kept out, and that has many beneficial effects for how your skin looks and feels.

4) To boot, niacinamide regulates sebum production in the skin – down or up-regulating the amount of oil skin produces in case of an imbalance. AND it functions as a tyrosinase inhibitor, suppressing the enzyme that sets off the transfer of melanin to the skin surface, which can result in dark spots and blotches.

What are the key benefits of niacinamide?

So how do the many talents niacinamide has translate into better-looking skin? Let us count the ways….

  • It’s an effective blemish-buster.

“Thanks to its sebum-regulating properties, niacinamide has anti-acne benefits, and it also has an anti-inflammatory action (which is essential for clearing blemishes as these are partly a result of inflammation),” says Dr Bunting. “Niacinamide, therefore, reduces the papules and pustules seen in acne. And there’s no risk of antibiotic resistance to it, making it a good alternative strategy to tackling acne with antibiotics.”

  • It makes pores look smaller

Niacinamide is one of the few ingredients that can help minimise the appearance of pores, thanks to its ability to stop them pumping out too much oil.

  • It calms irritation and inflammation

Due to its skin barrier-boosting action, niacinamide makes skin less prone to getting inflamed and irritated by attack from environmental factors such as pollution and stress. In short, it makes skin less sensitive; it’s one ingredient that’s used in the treatment of dermatitis and rosacea.  It also reduces inflammation from aggressive ingredients such as retinol and AHA’s. “It’s a good ingredient to combine with retinol, as it mitigates potential irritation,” says Wedgeworth.

  • It’s hydrating

Thanks to niacinamide helping skin to create more ceramides, more moisture will stay inside the skin, helping it to stay hydrated, supple and glowing at all times.

  • It evens out skin tone

Calmer skin means less redness and flushing. And “thanks to niacinamide reducing the transfer of pigment molecules to the top skin layers, it’s helpful in reducing hyperpigmentation (brown spots and blotches, and melasma),” says Bunting. Not only that, it makes dull skin look brighter and it reduces sallowness in those with a lot of yellow undertones: basically, it helps even out any skin tone.

  • It evens out skin texture

Niacinamide’s combined antioxidant (protective) prowess, hydrating ability and sebum-regulating properties help it minimise fine lines, small bumps and pores, giving an overall smoother, more even-textured effect. And smooth skin is fresher, glowier, more youthful-looking skin.

Who can use niacinamide?

Due to the all-encompassing benefits of niacinamide, it’s impressively universal in its appeal. “It’s suitable for all ages – from teens through to those with mature skin,” says Dr Bunting.

Are there any skin types that should steer clear of it? According to Bunting, no. “It’s suitable for even those with sensitive skin,” she says. “It’s a fantastic all-rounder that’s brilliantly well-tolerated so most people can benefit from it. It’s also safe in pregnancy and during breastfeeding.”

How should you use niacinamide?

“It’s suitable for morning and evening use,” recommends Bunting. “One of my favourite products incorporates it into a sunscreen.” Which, given its sun-protective and anti-hyperpigmentation qualities, is a great idea. But niacinamide works just as well in serum formulations, layered under day cream and/or sunscreen.

How does niacinamide fit in with other ingredients?

Seamlessly, basically. Niacinamide is one of the most versatile ingredients out there. It works very well in conjunction with other actives, and when these have a potential to irritate, niacinamide will reduce the risk of reactions. It’s worth starting on niacinamide before you start a retinoid if you have sensitive skin,” recommends Dr Bunting.

In hyperpigmentation-reducing serums and creams, niacinamide’s ability to reduce melanin transfer (it’s called a ‘tyrosinase inhibitor’) is fantastic combined with ingredients that lighten and brighten skin, such as kojic acid, licorice and vitamin c (the online hype that it can’t be teamed with vitamin C is a myth and a misunderstanding of the facts), and exfoliating acids such as lactic and salicylic acid. It also works beautifully with other antioxidants such as green tea for broad-spectrum free radical protection and repair. In anti-acne products, it sits well with other blemish-busting staples such as salicylic and azelaic acid and retinoids.

MORE GLOSS: Retinol & retinoids decoded - the skin experts’ guide

What risks and side-effects does niacinamide have?

Refreshingly, there are very few red flags to take heed of before incorporating niacinamide into your regime. “It’s very low-irritancy – I’ve not seen any patients have problems using it,” says Dr Bunting. Having said that, there are quite a few very high-concentration (10 per cent and over) products on the market right now, which can cause flushing and irritation in very sensitive skins. The added benefits of 20 or 30% concentrations haven’t really been proven yet so you may want to avoid overdoing it.

How much niacinamide do we need?

Any concentration of niacinamide from about 0.5 per cent will help to maintain the health and appearance of your skin, with dosages from two per cent recommended as a minimum for visible results and five per cent being seen as a real ‘sweet spot’ for faster results without any irritation. 10 per cent niacinamide is a potent concentration for those who are used to the ingredient and want to see dramatic results. But as always, don’t stare yourself blind on single-ingredient concentrations and go for formulas with lots of actives that work in synergy towards a particular goal instead. That way you maximise the benefits of niacinamide without inviting any drawbacks.

The best niacinamide serums and moisturisers

Best for evening skin tone: La Roche-Posay Pure Niacinamide 10, £38

Created to tackle the three main types of hyperpigmentation (melasma, age spots and post-inflammatory hyperpigmentation, ie scars and blotches that form after injury and spots), this light, minimally-scented serum allows for easy layering with other active serums such as vitamin C to customise your skincare. Boasting 10 per cent niacinamide, 5 per cent HEPES (no not herpes - this is a very mild exfoliant to dissolve old pigmentation) and hydrating and anti-inflammatory agents, this is a potent all-round brightener and evener-outer.

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Best niacinamide-rich sunscreen:  Dr Sam's Flawless Daily Sunscreen SPF50, £29

This beautifully rich-but-not-oily broad-spectrum sunscreen has a mix of mineral and chemical filters plus a punchy 5 per cent niacinamide for serious 360* protection with skin-perfecting, brightening benefits to boot. It's basically everything you need in daily age-busting moisturiser.

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Best niacinamide-spiked retinol:  Olay Regenerist Retinol24 Night Serum with Retinol & Vitamin B3, £17.50

Niacinamide has long been a key ingredient in Olay skincare, and with this milky, lightweight retinol serum, the brand puts B3's hydrating and calming effects to excellent use. The niacinamide is there to take the sting out of the retinol complex and enhance its retexturising and brightening benefits, and it works. It's easy as A, B, see?

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Best for ageing skin:  Strivectin Multi-Action Super B Oil, £46.50

Yes, this is a light face oil, and that is because Strivectin does not use niacinamide but niacin, the acid form of vitamin B3. It has the same benefits as niacinamide but it's known to cause flushing, which is why it's usually avoided. Strivectin have however created a lipid (oily) compound to encapsulate the active in, managing to stabilise it, make it bio-available, and take the redness-causing sting out in one fell swoop. The compound, NIA 114, is patented and you will only find it in this brand. Of course, they claim it's far superior to niacinamide, and many fans agree. Here, it's hung up in a blend of super-active plant oils such as rosehip and passionflower, and boosted by a skin barrier-building complex of probiotics and algae. It's a bit over-scented for our liking, but we do love it for its rich, healing moisturisation and its ability to brighten and smoothe craggy, dull, lifeless complexions.

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Best glow-giver: Glow Recipe Watermelon Glow Niacinamide Dew Drops, £31

Light and fresh, this smells of watermelon (surprise!) and gives such a beautiful instant glow (that flatters any skin tone), we have been known to use it as a subtle highlighter. It's no surprise as the brand is Korean, land of Chok Chok and glass skin as wel as gentle skincare formulations. Teaming a high dose of B3 with quenching, antioxidant ingredients, it'll preserve your radiance for years to come.

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Best for minimising pores:  Paula's Choice 10% Niacinamide Booster, £37.40

Super-light and watery, this unscented treatment layers easily under, well, everything. It's high level of niacinamide and gaggle of other active ingredients (antioxidants, brighteners and soothing agents) make it a dead cert for seeing real results, fast. Fans report 'airbrushed' pores, blemishes on retreat and visisbly more even-toned skin.

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Best Budget niacinamide:  Garden of Wisdom Niacinamide Serum, £10

This bestseller from Victoria's Health's budget skincare brand, Garden of Wisdom , is small in price but mighty in effects. Another light and unscented watery gel, it's teamed with hydrating vitamin B5 to leave skin softer, smoother, calmer and less prone to breakouts.

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Best for sensitive skin:  Barbara Sturm The Better B Niacinamide Serum, £110 for 30ml

This unscented, milky serum is, like all Dr. Sturm's products, laced with lots of anti-inflammatories including her favourite, purslane, plus plankton and vitamin B5. Barbara sees inflammation as the main cause of ageing so soothing, barrier-building niacinamide is the right ingredient for her to tackle signs of ageing such as hyperpighmentation and wrinkles. It works (despite the annoying, stingey dropper), but it had better at that price!

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Best power moisturiser:   Trinny London Energise Me Niacinamide Moisturiser, £42

Trinny keeps banging out clever skincare products at breakneck speed, and this all-purpose age-defying moisturiser  is no exception. Besides an active dose of B3, it recharges, brightens, smoothes and balances tired skin with chlorella vulgaris (an algae that gives the light lotion its duck egg-blue tint), energising succinic acid and calming cica, and it soothes the mind with its gentle, herby scent. It's like an anti-stress supplement for your face.

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Best for instant perfection:  Keys Soulcare Let Me Glow Illuminating Serum, £25

This gently scented, moisturiser-like serum-primer has a sheer golden tint that flatters all complexion shades without ever looking chalky. You can use it as a luminous base or on its own, and besides the instant healthy gleam it gives, it'll work on long-term brighter skin as well thanks to its injection of niacinamide and antioxidants.

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Best for blemish-busting:  Beauty Pie Superdrops Brightening Niacinamide (10%), £60 (£13.36 for members)

Another powerful 10-per cent-er, this niacinamide bomb also has a peptide-based surfactant to help prevent breakouts, an oxygen complex to calm acne and speed up wound healing, and a mattifying agent to magic pores away. Oh, and the super-light, unscented serum will also do all the usual brightening, hydrating and soothing. You can even mix it in with any other product you like - it's not precious, but it is effective.

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For more skincare advice from Dr Bunting, follow her on  Twitter  and  Instagram .