The 6 best niacinamide serums to nourish your skin's barrier and smooth fine lines

From iconic brands to French pharmacy favourites, our team has tested an array of niacinamide serums to bring you the best of the best...

A selection of product pictures of the best niacinamide serums featured in this guide, from Clarins, Olay, Vichy, Beauty Pie, La Roche-Posay and Naturium, scattered across a pastel purple watercolour paint-style template
(Image credit: Clarins/Olay/Vichy/Beauty Pie/ La Roche-Posay and Naturium)

Boasting a multitude of benefits, niacinamide is the hardworking but somewhat unsung hero of the skincare world, and according to our beauty team, these are the best niacinamide serums and creams deserving of a spot in your routine.

If asked to name a popular and powerful skincare ingredient, most people would likely reel off retinol, vitamin C and of course, hyaluronic acid. After all, the best hyaluronic acid serums are famous for their hydration-boosting powers and vitamin C treatments, for instance, for their brightening effects. However, there's another, lesser talked about luminary that does just about anything and everything we’d look for in a skincare product: niacinamide.

This humble ingredient is no one-trick pony; it hydrates, soothes and smoothes your complexion and in case you're keen to add it to your arsenal, our beauty team has tested an array of the best formulas and quizzed skincare experts on all things niacinamide...

The 6 best niacinamide serums to add to your stash, per a beauty expert

From La Roche-Posay to Vichy, our beauty expert has tested an array of niacinamide-enriched serums and creams to bring you the top six formulas that are worth investing in - with options to suit every skin type and budget.

How we tested the best niacinamide serums

Like with the best retinol serums and creams, as well as the best face moisturisers, our tester tried every single formula featured in this guide.

To edit down our recommendations for niacinamide serums (and one cream!), we looked for products with a range of concentrations from 2% up to 12% - this allowed us to see the results of varying percentages. Added humectants, like hyaluronic acid and vitamin E, are positive additions to niacinamide serums, too. Those with low synthetic fragrance and low in silicone were favoured as well.

Our expert panel

Meet the testers
Charley Williams-Howitt
Meet the testers
Charley Williams-Howitt

Charley Williams-Howitt is a beauty editor with over 20 years of experience. Like a lot of people, she is a recent convert to niacinamide. Since turning forty, she has noticed a lot more redness and pigmentation on certain parts of her face, as well as dryness that hasn’t been shown itself previously. She is always on the lookout for super hydrating products that go the extra mile.

Meet the experts
Meet the experts
Dr Ahmed El Muntasar

Dr Ahmed El Muntasar is an award-winning aesthetics doctor with clinics around the UK, who has shared insights into what niacinamide is and how it works.

Meet the experts
Meet the experts
Dr Malvina Cunningham

Dr Cunningham is a Consultant Dermatologist at skincare brand Skin+Me, which houses an array of hardworking formulas and offers personalised treatments. Dr Cunningham has shared with us the benefits of niacinamide and how to incorporate it into your routine.

Meet the experts
Meet the experts
Dr Sam Bunting

Dr Sam Bunting (Cosmetic Dermatologist MA Cantab, MBBS, MRCP UK), is the founder of the eponymously-named skincare brand and clinic DR SAM BUNTING, which offers personal consultations and accessible treatments and products. For this guide, Dr Bunting has shared her expertise on niacinamide and all its benefits.

What is niacinamide?

To avoid any classic niacinamide mistakes, it's important to know exactly what the ingredient is and equally, what it does.

"Niacinamide is a form of Vitamin B3," explains Dr. Cunningham, Consultant Dermatologist at Skin + Me. "It’s a vitamin that’s beneficial for our bodies inside as part of a healthy diet (niacin is found in foods such as grains, fish, meat and beans and converts to niacinamide when eaten) and keeps our skin healthy on the outside when applied topically."

It does this, according to Dr Ahmed El Muntasar, a GP and award-winning aesthetician, "by helping build up some proteins, useful proteins in the skin, plus, it helps maintain hydration and it protects your skin from the environment that we're in, including the damaging effects of pollution and the sun."

Why is niacinamide so popular?

Niacinamide has a throng of skincare benefits, such as soothing fine lines and wrinkles, boosting skin’s elasticity and reducing signs of environmental damage.

"It's an all-round crowd-pleaser," says Dr. Sam Bunting. "Versatile, well-tolerated and it’s actually a dream to formulate as it doesn't need any special treatment."

The popularity of niacinamide could also be due to the fact that now, we are much more aware of the importance of supporting our skin barrier. Not only does niacinamide help to strengthen this barrier, but because it gets along with other actives, such as retinol and alpha hydroxy acids, it allows our skin to tolerate these ingredients better.

What are the benefits of niacinamide?

How long have you got?! If ever there was an ingredient all-rounder, this is it. "From improving skin texture and tone to enhancing the skin barrier function to diminishing the appearance of fine lines and wrinkles," enthuses Dr. Cunningham.

It can also help with increasing the skin’s tolerance to topical retinoids, according to Dr. Bunting, and she suggests using niacinamide before starting a retinoid if you have sensitive skin. Plus, she adds. "This is a great way to help improve compliance with retinoids in acne sufferers who also have a tendency to dry, sensitive skin."

Who can use niacinamide?

Niacinamide has extensive advantages and is just about universally effective for every skin type. "It’s suitable for all ages – from teens through to those with mature skin," agrees Dr. Bunting. "It’s a fantastic all-rounder that’s brilliantly well-tolerated so most people can benefit from it."

Plus, adds Dr. Cunningham, "it is more gentle than retinol and retinoids in terms of its skin-ageing benefits and is safe to use during pregnancy."

How much niacinamide do we need?

According to Clarins, while niacinamide is highly tolerated and best for all skin types, it can be found in varying concentrations, with 10% being the highest. As a result, it may lead some to skin irritations, while a concentration that is too low will have minimal effect.

Dermatologists recommend starting at around 2-3% and working up to a maximum of 10% depending on how your skin reacts to it. In regards to when to apply, Dr. Bunting says that, "niacinamide can be used at any time of day. It can be built into sunscreen in the morning and it can be used in a serum format at night."

Any precautions before using niacinamide?

Niacinamide is generally quite a good ingredient for your skin. However, Dr Ahmed El Muntasar advises to be careful not to over-hydrate your skin.

"Sometimes people can use niacinamide, hyaluronic acid, ceramides and all these different hydration products, thinking that ‘hydration, hydration’ is always a good thing. However, if you're acne-prone, that could be quite bad because that can actually break you out. So too much of a good thing, could be a bad thing."

Charley Williams-Howitt

Charley Williams-Howitt has over 20 years of experience working in the beauty industry. As well as previously writing for lifestyle titles, such as woman&home, Woman and Woman's Weekly, Charley has worked for British institutions like Marks and Spencer, John Lewis, and Superdrug creating visual and editorial content cross-platform. Starting her career in the fashion cupboard at Cosmopolitan magazine, she eventually escaped the piles of clothes to discover a world of makeup, moisturizers, and models.

With contributions from