The Ordinary vs The INKEY List Niacinamide: Which Should You Choose?
Compare two 10% niacinamide serums by supporting ingredients, tolerance, packaging and cost per 10 ml.
Products covered
The Ordinary Niacinamide 10% + Zinc 1%; The INKEY List Niacinamide Serum. These are examples for careful comparison, not a performance ranking.
What the official product information says
The Ordinary lists 10% niacinamide and zinc PCA in its water-based formula. The INKEY List lists 10% niacinamide alongside humectants including glycerin and hyaluronic acid.
Explore the evidence, sources & limitations ↓
What actually matters when choosing
Both highlight 10% niacinamide, but their supporting ingredients and textures are not identical. Choosing based only on the concentration ignores tolerability, finish and other routine steps.
Transparent price-per-10-ml calculation
A reproducible example (not a live price comparison): if Serum A costs €7.95 for 30 ml, its cost is €2.65 per 10 ml. If Serum B costs €10 for 30 ml, its cost is approximately €3.33 per 10 ml. At those hypothetical checkout prices, Serum A is about 20.4% cheaper per 10 ml. This arithmetic does not establish better effectiveness or overall suitability. Replace both prices with verified current delivered prices before making a buying decision.
Compare the real checkout cost
Check current price, bottle volume and shipping in your country. To compare prices fairly, calculate (price ÷ millilitres) × 10 for cost per 10 ml. Prices change, and a lower unit price does not guarantee a better product.
Who might prefer each option?
Compare whether you need a separate serum at all, then check complete ingredients, packaging, skin sensitivity and your existing routine. Patch-test according to manufacturer advice and stop if irritation occurs.
Official product sources and verification
Official product information: https://theordinary.com/fr-fr/niacinamide-10-zinc-1-serum-100436.html | https://www.theinkeylist.com/products/niacinamide-serum. Sources describe marketed formulations; review packaging for the batch and market you buy. These links are editorial references, not affiliate endorsements.
Compare at a glance
| Product | Useful comparison point |
|---|---|
| The Ordinary Niacinamide 10% + Zinc 1% | The Ordinary lists 10% niacinamide and zinc PCA in its water-based formula. |
| The INKEY List Niacinamide Serum | The INKEY List lists 10% niacinamide alongside humectants including glycerin and hyaluronic acid. |
Frequently asked questions
Which product is better?
There is no universal winner. The best fit depends on your goals, the complete formula, tolerance and real delivered cost.
Are these current retail prices?
No live price comparison is provided. Verify current prices with each seller and compare cost per 10 ml.
Can a percentage or ingredient list prove results?
No. Formula, use, individual response and quality of evidence all matter.
Read how we compare products and about GHINÉVA. General educational content only; not medical or dermatological advice. Consult a qualified professional for personal skin or hair concerns.