The value benchmark — 10% niacinamide + 1% zinc, fragrance-free, a few dollars. The default first serum.
The Ordinary Niacinamide 10% + Zinc 1% is the value benchmark the entire niacinamide category is measured against. It puts 10% niacinamide — the top of the clinically sensible ~5-10% range — alongside 1% zinc PCA for sebum and blemish support, in a fragrance-free, oil-free, water-based serum that costs about the price of a coffee. Ten percent is the right strength: high enough to work on tone, oil and the look of pores, not so high it courts the irritation that 12-15% serums invite.
The 1% zinc is a genuine bonus most single-ingredient serums skip, and the fragrance-free base is exactly what niacinamide's barrier-supporting job wants. The one real quirk is texture — the water-based solution can pill if layered over silicone-heavy products, so it goes on slightly damp skin. For most buyers this is the whole decision.
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10% niacinamide sits right at the top of the studied ~5-10% sweet spot (Bissett 2005 got results at 5%), so it earns near-full marks — effective for tone, oil and pores without chasing a needless higher number. Loses a fraction only because 10% is a touch strong for the most reactive skin.
1% zinc PCA adds real sebum/blemish support, and the base is fragrance-free and oil-free — a barrier-respecting formula. Held back from top marks by the absence of hyaluronic acid, ceramides or other cushioning soothers beyond the zinc.
Generally well tolerated and fragrance-free, layering cleanly with other actives including vitamin C. Small deductions for the 10% strength being slightly much for very sensitive skin and the water-based texture's pilling tendency.
At roughly $7 for 30 ml (~$0.23/ml) it is the cheapest genuinely-good niacinamide serum on the shelf and the reference price every rival is compared against — an essentially perfect value score.
Transparent actives panel (exact 10% + 1% stated) and clean layering, but basic dropper packaging, a pilling-prone water base and no soothing or antioxidant extras keep it short of the best-finished serums.
“Contains 10% niacinamide and 1% zinc PCA.”
The 10% niacinamide + 1% zinc PCA composition is stated on the label and matches the product's documented formula — the exact actives and percentages are disclosed, which is the transparency the category is scored on.
“High-strength vitamin and mineral blemish formula.”
The brand's 'high-strength' framing overstates it: 10% is a moderate, sensible strength, not a high one. The clinical work (Bissett 2005 at 5%, Draelos 2006 at 2%) shows moderate concentrations are what deliver results, so '10%' is effective but not 'high-strength' in any meaningful clinical sense.
“Reduces the appearance of blemishes and balances visible sebum activity.”
Niacinamide and zinc have real oil-support evidence — Draelos 2006 showed 2% topical niacinamide cut facial sebum excretion — so the sebum-balancing direction is supported. But the specific blemish-reduction claim is a manufacturer marketing statement for this finished product, not a result from a trial on this serum.
“Fragrance-free and oil-free.”
The fragrance-free, oil-free, water-based description is consistent with the disclosed formula and the brand's published INCI — a barrier-respecting base, which is exactly what a niacinamide serum should be.
The whole guide argues against buying niacinamide on the percentage, and this pick is the proof: 10% sits at the top of the clinically sensible range (Bissett 2005 got real tone, redness and line improvements at just 5%), so it works on oil, tone and pores without the irritation risk that 12-15% serums invite. It's the strength most people should actually use.
1% zinc PCA is a genuine sebum/blemish-support bonus that most single-ingredient niacinamide serums skip. For oily or blemish-prone skin, that pairing is why The Ordinary edges out otherwise-similar picks like the Inkey List (#3), which swaps zinc for hyaluronic acid instead.
At roughly $0.23/ml this is the cheapest genuinely-good niacinamide serum on the shelf. Under the guide's quality-over-price rule it doesn't win on price alone — it wins because it's well-formulated AND cheap, which is a rare combination. It's the reference product every rival is implicitly trying to beat.
The one real texture quirk: the water-based solution can pill or 'roll' if you layer it over silicone-heavy primers or moisturizers. The fix is simple — apply to slightly damp skin, let it fully absorb before the next layer. Do that and the finish is clean under sunscreen or makeup.
Ten percent is well tolerated for most, but it's a touch strong for the most reactive skin. If you sting or flush, start every other day and build up — the barrier-supporting benefit of niacinamide is undercut if you push a strength your skin is fighting.
If you want one niacinamide serum and don't want to overthink it, this is the answer and has been for years. Ten percent is the right strength — high enough to work on oil, tone and pores, not so high it courts irritation — and the 1% zinc PCA is a real bonus for blemish-prone skin that most rivals skip. It's fragrance-free, it costs about the price of a coffee, and it's the product every other serum on this page is implicitly trying to beat. Apply it to slightly damp skin to avoid pilling, start once daily, and build from there. The only buyers who should look elsewhere are the very reactive (start slower or choose a gentler booster like Paula's Choice #2) and those who specifically want a luxe, antioxidant-loaded formula. For everyone else, it's the value benchmark for a reason — and ignore anyone who tells you it can't share a routine with vitamin C.
The best-formulated serum on the page — same 10% strength on a gentler, fragrance-free base with vitamin C and licorice. The upgrade if you value formula quality over rock-bottom price.
See it on the list →The other few-dollar benchmark — 10% niacinamide plus 1% hyaluronic acid instead of zinc, so you trade blemish support for a hydration bump. The pick for normal-to-dry skin on a tight budget.
See it on the list →A plain, no-frills 10% serum at a value price — the same sensible strength without a hero support ingredient. The easy alternative if it's the one in front of you.
See it on the list →In a 12-week double-blind, split-face study, 5% topical niacinamide applied twice daily significantly reduced fine lines, hyperpigmented spots, red blotchiness and sallowness versus vehicle — the anchor evidence that a moderate concentration works, which is why this 10% serum's sensible strength is rewarded over higher-number rivals.
Topical 2% niacinamide reduced facial sebum excretion rate over 4-6 weeks — the reference for niacinamide's oil-control mechanism and the basis for crediting the sebum/blemish support behind this serum's niacinamide + zinc pairing.
