Niacinamide, Honestly: What It Does for Dark Spots — and Why 10% Isn't "Stronger"

It's in your serum, your moisturiser, your face wash and your sunscreen. Here's what it's actually doing in there.

Niacinamide is the ingredient nobody gets excited about and everybody ends up using. It doesn't sting, it doesn't peel you, it has no cult following — and it has quietly become the fastest-rising thing people search for on our site. That combination is unusual enough to be worth an honest explainer, because most of what's written about it online is either a shrug or a percentage war.

What niacinamide actually does

Niacinamide is a form of vitamin B3, and unlike most of the actives that get the attention, it works on several fronts at once rather than doing one dramatic thing:

• It interrupts pigment on the way up. Melanin is made deep in the skin and then handed off to the cells at the surface. Niacinamide interferes with that hand-off — so existing dark marks fade gradually rather than being bleached away. This is why it shows up in almost every dark-spot formula on the shelf.
• It helps the skin build its own barrier. It nudges the skin to produce more of its own ceramides and lipids, which is the difference between skin that copes with heat, air conditioning and actives, and skin that reacts to all three.
• It calms oil and the look of pores. Less oil sitting in a pore means the pore looks smaller. That is a real effect and a modest one — see below.
• It takes the heat out of redness. Not as fast as centella, but steadily, and while doing everything else.

What it doesn't do: work overnight. Niacinamide is an eight-to-twelve-week ingredient for pigment and a two-to-four-week ingredient for oil and comfort. It rewards the boring approach.

The percentage trap

Here is the part the labels won't tell you. A higher percentage of niacinamide is not the advanced version of a lower one. The benefit curve flattens out early — most of what niacinamide has to offer is already happening at around 4–5% — while the chance of stinging, flushing and irritation keeps climbing as the number goes up. A 10% formula isn't twice the result of a 5% one. It is the same job, with more room to go wrong.

🟤 And on melanin-rich skin, that matters more than it does anywhere else. Almost every ingredient guide online is written for fair skin, where an irritated patch goes red and then goes away. On brown and deep skin, irritation and inflammation leave a mark behind — post-inflammatory hyperpigmentation. So an over-strong active bought specifically to fade dark spots is entirely capable of creating new ones. The rule is not "go as strong as you can tolerate". It is:

• Start at the lower percentage. If 5% is working, there is nothing to upgrade to.
• Patch test on the jaw for a few nights before it goes on your whole face.
• Every other night first, then daily once your skin is bored of it.
• If it stings, stop. Stinging is not the product working. On melanin-rich skin it's the beginning of the exact problem you're trying to solve.

Shop the story: the serums

The Derma Co 5% Niacinamide Daily Serum
The sensible starting point — niacinamide with alpha arbutin, for anyone new to it

Anua Niacinamide 10% + TXA 4%
Pairs niacinamide with tranexamic acid — the combination built for stubborn marks

The Derma Co 10% Niacinamide Serum
The straight-up version, for skin that already tolerates it well

You don't actually have to add a serum

Niacinamide is one of the few actives that works perfectly well as a passenger. It's stable, it doesn't need a particular pH, and it doesn't care much whether it arrives in a serum, a cream or a cleanser — so if your routine is already three steps and you'd like to keep it that way, get it in a step you're doing anyway. A face wash is the weakest delivery of the three (it's on your face for thirty seconds), a moisturiser the strongest, because it stays on.

The Derma Co 5% Nia-Ceramide Moisturiser
Niacinamide and ceramides in one step — matte finish, built for humid days

Dr. Sheth's Centella & Niacinamide Cream
Cica alongside the niacinamide — the gentlest route in for easily-irritated skin

The Man Company Vitamin C Face Wash
Vitamin C and niacinamide in the one step most men will actually keep doing

The pores question, answered properly

Niacinamide will not shrink your pores. Nothing will — pore size is largely structural, and any product promising otherwise is selling you a photograph. What niacinamide genuinely does is reduce how much oil sits in and around the pore, and an emptier pore casts less of a shadow, so the skin reads smoother. In this climate that's not a small thing: heat drives oil production up, and by four in the afternoon the difference between a mattifying routine and a heavy one is visible from across a room.

If oil and congestion are your actual complaint rather than dark spots, aim the niacinamide there instead:

The Derma Co Sali-Cinamide Face Wash
Salicylic acid to clear the pore, niacinamide to calm what's around it

The Derma Co Pore Minimizing Moisturiser
3% niacinamide with PHA — the mildest exfoliating acid family, for texture

Dr. Sheth's Centella & Niacinamide Sunscreen
Oil-control SPF — the step that decides whether the fading holds

"You can't use niacinamide with vitamin C" — you can

This one has been repeated online for years and it comes from a genuine piece of chemistry that has almost nothing to do with your bathroom. Under heat and in particular laboratory conditions, niacinamide and pure ascorbic acid can react and form a compound that causes temporary flushing. In a modern, properly formulated product, at the concentrations and pH actually used, this is not what happens — which is why so many formulas now put both in the same bottle on purpose.

If you're cautious, split them: vitamin C in the morning under sunscreen, niacinamide at night. If you're not, use them together and watch your own face rather than the internet. The pairing is a good one — vitamin C is the brightening active, niacinamide is what makes the rest of the routine tolerable enough to keep going.

Pair it like a pro

ARENCIA Vitamin C Booster Shot
The morning half of the pair — a concentrated vitamin C shot, back in stock

The Derma Co C-Cinamide Radiance Sunscreen
Vitamin C and niacinamide inside the SPF — both, in one step, settled

AXIS-Y Dark Spot Correcting Glow Serum
The K-beauty take on the same job, if you'd rather one bottle than two

The one step that decides whether any of it works

Sunscreen. Every single morning, whatever the sky is doing. Fading pigment while it's being re-triggered daily by UV is the skincare equivalent of bailing out a boat that still has a hole in it — and here, the sun is not a seasonal problem. If you only take one instruction from this page, take that one, and read our SPF guide for the rest.

The short version

Niacinamide is the multitasker: it fades marks slowly, calms oil, softens the look of pores and helps your barrier build itself back. Start at the lower percentage, because higher isn't better — the benefit plateaus early while the irritation risk doesn't, and on melanin-rich skin irritation is how new marks get made. Give it eight to twelve weeks for pigment. Wear sunscreen or don't bother.

Where it fits with everything else

If your skin is reacting to everything, start with centella and come back to niacinamide once things are calm. If the barrier itself is the problem, ceramides rebuild the wall. If you want the brightening to move faster, vitamin C is the active to add — and if it's redness and post-acne marks specifically, azelaic acid is the one to read next.

Browse the full Niacinamide Skincare collection, or see what's trending in our VIRAL 🔥 collection.

Get it today: order online with island-wide delivery, or choose free Click & Collect and pick it up at one of our shops.