Niacinamide 10%

Here's a design question the skincare industry mostly got wrong: if niacinamide at 10% is the concentration dermatologists keep pointing to for sebum control and pigment management, and it's cheap to manufacture, why is it almost always sold in tiny 30ml dropper bottles marketed as precious treatment serums? The Ordinary set the pricing template in 2016, and every brand that followed essentially copied the format. One Thing arrived in 2020 with a different answer: put the same 10% niacinamide in a 150ml bottle, call it an essence, and let people actually use it every day without counting drops.

That format change matters more than it sounds. When a niacinamide product costs 80 cents per ml, users tend to rationalize it — small amounts, every other day, only on problem areas. When it costs 10 cents per ml, the calculation flips. You pour a generous puddle, pat it onto your whole face, use it morning and night, and treat it as an infrastructure layer rather than a special intervention. That's how niacinamide is supposed to work. The research on sebum reduction, barrier improvement, and post-inflammatory hyperpigmentation fading is based on twice-daily application over 8 to 12 weeks, not occasional spot treatment.

The formula itself is almost impressively unambitious, which is the point. Niacinamide at 10%, butylene glycol and glycerin as humectants, allantoin and panthenol as barrier soothers, sodium hyaluronate for a hydration assist, a drop of adenosine (a Korean-regulated anti-wrinkle active that contributes a minor smoothing effect), 1,2-hexanediol for preservation, and water. No fragrance, no essential oils, no plant extracts chasing a trend, no unnecessary peptides or exotics. The ingredient deck is so short that any given drop of the essence is about 90% doing one job: delivering niacinamide.

On skin it's indistinguishable from water with a faint slip. It absorbs in seconds, leaves no tack, and pills under nothing — including sunscreens, silicone primers, and makeup. The lack of added zinc (a common companion ingredient in niacinamide formulas) means the texture stays thinner and cleaner than versions that include zinc PCA. It also means you don't get the slight grittiness that zinc sometimes contributes, which matters more than you'd think for daily wearability.

Results follow the usual niacinamide timeline. Oil control and pore appearance improvements show up around weeks 2 to 3 — not because pores actually shrink (they don't, physically) but because reduced sebum congestion and improved keratin turnover make pore openings look smaller. Post-inflammatory hyperpigmentation fading is slower, as always: expect 8 to 12 weeks of consistent twice-daily use before the flatter dark marks start to visibly fade. Users with compromised barriers often notice the barrier-calming effects first, within a week or two. Users expecting a dramatic transformation out of a 10 cents-per-ml essence will be disappointed, but users expecting incremental, cumulative improvement will be rewarded.

The flushing caveat is worth mentioning. A small percentage of users — especially those with rosacea or very reactive skin — experience temporary vasodilation in the first week of using 10% niacinamide. This shows up as transient redness lasting 15 to 30 minutes after application, and it typically fades as the skin adapts. If you're in that camp, the solution is to introduce the essence every other day for the first two weeks rather than diving straight into twice-daily use. It's a real-world tolerance issue, not a formulation flaw, and it applies to any 10% niacinamide product.

Value is where this product becomes almost a no-brainer. At roughly $16 for 150ml, you're paying around 10 cents per ml for a clinically relevant niacinamide concentration. A typical twice-daily face application lasts about three to four months, which works out to $4 to $5 per month. For comparison, Paula's Choice 10% Niacinamide Booster runs about $44 for 20ml — more than 10 times the per-ml cost. Even The Ordinary's famous cheap version costs about 5 times more per ml. One Thing isn't a legacy derm brand with decades of clinical research behind its name, but it doesn't need to be. The active is off-patent and well-studied, the formula is minimal enough to leave almost nothing to get wrong, and the value is unbeatable. For niacinamide specifically, this is the one to beat.

Formula

The Science

Niacinamide is one of the most thoroughly studied cosmetic actives of the past three decades. A 2005 study in the British Journal of Dermatology (Hakozaki et al., originally published 2002 and replicated through 2005) demonstrated that topical niacinamide at 2-5% significantly reduced facial hyperpigmentation by interfering with melanosome transfer from melanocytes to keratinocytes — notably, without inhibiting tyrosinase activity, which is how it differs mechanistically from hydroquinone. A 2006 paper in the Journal of Cosmetic and Laser Therapy (Draelos et al.) found that 2% niacinamide reduced sebum excretion rates in Japanese and Caucasian subjects, with measurable results at 2-4 weeks. Higher concentrations, up to 10%, have shown additional barrier function improvements via upregulation of ceramide and free fatty acid synthesis. What's interesting about One Thing's 10% formulation specifically is that it uses the active at the upper edge of the clinically useful range while keeping the excipient list minimal enough to avoid dilution or interference. Most of the supporting cast — panthenol, allantoin, adenosine, sodium hyaluronate — is there to buffer the mild vasodilation response that a small minority of users experience at 10% niacinamide. The formula is calibrated for tolerance rather than maximum active delivery, and in real-world use that's the right trade-off.

References

1. The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer — British Journal of Dermatology (2002)

Dermatologist Perspective

Dermatologists routinely recommend niacinamide at 2-10% as one of the most versatile actives in modern skincare. Board-certified dermatologists note that niacinamide's mechanism — reducing melanosome transfer rather than inhibiting tyrosinase — makes it a useful complement to hydroquinone, azelaic acid, or tranexamic acid in hyperpigmentation protocols. It's also commonly used alongside topical retinoids to help offset retinoid-induced barrier disruption. Clinical guidance emphasizes that niacinamide is safe during pregnancy and compatible with virtually every other topical active, which is why it appears in so many 'universal add-on' recommendations. The 10% concentration in this essence is the upper edge of what most practitioners consider clinically useful before the risk of flushing or irritation outweighs the incremental benefit.

Guidance

One Thing launched the Niacinamide 10% essence in 2020 as a follow-up to its viral Centella Asiatica and Hyaluronic Acid essences. The brand's pitch was simple: if 10% niacinamide is the clinically meaningful concentration for sebum control and pigmentation, why sell it as a precious 30ml dropper bottle instead of a generous everyday essence? It's now one of the brand's bestsellers globally.

About One Thing Emerging Brand (2–5 years)

One Thing launched in 2018 in South Korea with a minimalist single-ingredient philosophy. While the brand is still relatively new, its niacinamide essence uses a well-studied active at a clinically relevant concentration, making the formulation itself conservative even if the brand's track record is short.

Brand founded: 2018 · Product launched: 2020

Myth vs. Reality

Myth

You can't layer niacinamide with vitamin C.

Reality

This concern came from a 1960s study on pure niacin (not niacinamide) at very high temperatures. Modern formulations of niacinamide and L-ascorbic acid layer fine in real-world use, and this essence is stable enough to apply directly before or after any vitamin C serum.

Myth

Higher niacinamide concentrations always work better.

Reality

Above 10%, the risk of irritation and flushing increases without clear additional benefit. One Thing's 10% sits at the upper edge of the clinically useful range without crossing into the territory where most users develop reactions.

FAQ

Common Praise

"Noticeable improvement in oiliness"

"Large size for the price"

"Non-sticky feel"

"Visible pore appearance improvement"

Common Complaints

"Flushing reaction on very sensitive skin"

"Doesn't smell like anything (some expect a 'scent cue')"

"Needs patience for PIH fading"

Notable Endorsements

Hyram Yarbro

Appears In

best serum for large pores best k beauty niacinamide best budget niacinamide serum best serum for oily skin

Related Conditions

large pores hyperpigmentation oiliness acne

Related Ingredients

niacinamide panthenol adenosine