The Ordinary Niacinamide 10% + Zinc 1%: The $6 Serum Everyone Owns
Product Details
What we liked
- Extraordinary value at $5.90
- Effective at reducing excess oil production
- Zinc PCA adds oil-control benefits
- Minimal, no-nonsense formula
- Widely available and easy to find
What could be better
- 10% concentration may be too high for sensitive skin
- Can cause irritation and flushing in some users
- Pilling issues when layered with silicones
- Most research supports 2-5% concentration, not 10%
The Ordinary's Niacinamide 10% + Zinc 1% is probably the most-purchased serum on the planet. At $5.90, it costs less than a coffee. But the question isn't whether you can afford it — it's whether 10% niacinamide is actually the right concentration for your skin.
The Science of Niacinamide
Niacinamide (vitamin B3) is one of the most well-researched skincare actives. At concentrations of 2-5%, studies show it can reduce sebum production, minimize pore appearance, calm redness, and improve skin barrier function. Key word: 2-5%.
At 10%, you're getting double the studied concentration. More isn't always better in skincare. Some dermatologists argue that 10% niacinamide can cause irritation, flushing, and even breakouts in sensitive individuals — precisely the opposite of what you're trying to achieve.
The Formula
Beyond the concentration debate, this is a straightforward formula. Niacinamide as the hero, Zinc PCA for oil control, and a minimal supporting cast. The texture is watery with a slight tackiness. It layers well under moisturizer.
Real Talk
If this serum works for you — and for many people, it genuinely does — the value is extraordinary. But if you're experiencing irritation, redness, or breakouts, try a product with 4-5% niacinamide before writing off the ingredient entirely. The Ordinary's high concentration isn't for everyone.
The Pilling Problem
One common complaint: this serum pills under certain moisturizers and sunscreens. The tamarind gum in the formula can ball up when layered with silicone-based products. Pat (don't rub) when applying layers on top.
Ingredients Analysis
Niacinamide at 10% is the headline — above the 2-5% range used in most clinical studies, but still within safe limits. Zinc PCA provides additional oil control. The delivery system uses Dimethyl Isosorbide to enhance penetration. No fragrance, no unnecessary actives. Clean and focused.