Last updated: September 24, 2026
The Ordinary Niacinamide 10% + Zinc 1% is one of the best-selling serums in the world, largely because it targets oiliness and congestion at a rock-bottom price. With a high niacinamide concentration and zinc for oil balance, it became a staple for combination and acne-prone skin. This review covers what it does well and its known quirks.
The formula
Niacinamide at 10 percent supports oil regulation, tone and barrier function, while zinc PCA at 1 percent adds a sebum-balancing angle. The high concentration is aggressive by design, which is part of the appeal and part of why some people find it does not agree with them.
Texture
It is a lightweight, slightly slippery serum. A little can pill if you apply too much or layer it under certain products, so a few drops is usually enough.
Strengths and cautions
| Aspect | Verdict | Notes |
|---|---|---|
| Oil control | Strong | Great for oily skin |
| Price | Excellent | Very affordable |
| Tone support | Good | 10% niacinamide |
| Sensitivity | Variable | High % can irritate some |
How to use it
Apply a few drops to clean skin before moisturizer, once or twice daily. If you are sensitive, start once a day and build up. To avoid pilling, use a small amount and let it absorb before layering. It plays well with most routines and does not require special timing.
Who it suits
Oily, combination and congestion-prone skin benefit most from the oil-balancing effect. Very dry or sensitive skin may prefer a lower-concentration niacinamide product, since 10 percent can occasionally cause flushing or irritation. Patch testing is a smart first step.
Frequently asked questions
Is 10% niacinamide too strong?
For many people it is fine, but a minority find high concentrations irritating. If your skin flushes or feels tight, a 4 to 5 percent niacinamide product delivers most benefits with less risk.
Why does my serum pill?
Pilling usually comes from applying too much or layering incompatible textures. Use a few drops on clean skin, let it absorb fully, and apply your moisturizer gently on top.
Getting the application right
Most complaints about this serum trace back to using too much. A few drops is plenty for the whole face; a thick layer is more likely to pill, especially under sunscreen or makeup. Apply it to clean, dry skin, let it absorb fully for a minute, then follow with moisturizer. If pilling persists, try using it at night only, or under a hydrating serum that helps it spread more evenly.
Because it targets oil and congestion, it is a natural fit for the T-zone and areas prone to enlarged-looking pores, though it is safe to use across the whole face for most people.
When to choose a lower concentration
Ten percent niacinamide is on the higher end, and a minority of users find it causes flushing or irritation. If your skin is dry, sensitive or reactive, a 4 to 5 percent niacinamide product delivers most of the tone and barrier benefits with far less risk. There is no prize for pushing a high concentration your skin dislikes, so prioritize tolerance over the bigger number on the label.
How long until I see less oil?
Some people notice reduced shine within a couple of weeks, while tone and pore appearance improve over one to two months of consistent use. As always, pair it with daily sunscreen for best results.
Realistic results and its limits
This serum is excellent value for oil balance and general maintenance, but it is not a cure for acne or a replacement for treatment ingredients. Niacinamide supports the skin over weeks rather than clearing breakouts overnight, and pores do not physically shrink, though reducing oil and congestion can make them look smaller. Setting expectations here prevents disappointment: use it as a steady supporting act alongside a proper acne treatment if breakouts are your main concern.
Can I use it morning and night?
Yes, once your skin tolerates it. Many people start once daily to check for sensitivity, then move to twice daily. If you notice flushing or tightness, scale back the frequency rather than pushing through.
Bottom line
The Ordinary Niacinamide 10% + Zinc 1% is a budget powerhouse for oily, congestion-prone skin. It is not for everyone, but at its price it is an easy, low-risk experiment for anyone wanting to tackle shine and enlarged-looking pores.
