TRENDING ON AMAZON
The Ordinary Niacinamide 10% + Zinc 1% Serum Review: Is It Worth It?
A clinical-strength niacinamide serum for under $10 that calms oil, fades dark spots and visibly tightens pores after a few weeks.
Illustrative image — see Amazon for the actual product.
Our verdict
The Ordinary's 10% Niacinamide is the easiest, cheapest serum upgrade in skincare. A real, effective dose of an ingredient that actually works, for under ten dollars. If you have one good moisturizer, this is the next thing to buy.
The short version
Niacinamide is one of the few skincare ingredients almost every dermatologist actually agrees on — it calms breakouts, regulates oil, helps fade post-acne dark spots and visibly minimizes pores. The Ordinary stripped out the fancy packaging and put a 10% concentration in a plain pharmacy-style bottle for under ten bucks. Use it in the morning under sunscreen and in the evening before moisturizer; most people see less shine and clearer skin in two to four weeks. The internet's most-recommended cheap serum, and it deserves the reputation.
Pros & cons
Pros
- 10% niacinamide — a clinical, effective dose
- Under $10 for a months-long bottle
- Calms oil, breakouts and post-acne marks
- Visibly minimizes pores over weeks
- Sits easily under sunscreen and makeup
- Vegan and fragrance-free
Cons
- Plain packaging — no luxury experience
- Can pill under certain sunscreens if over-applied
- Not a moisturizer — you still need one
Why people love it
Apply 2-3 drops
After cleansing, smooth a few drops over the face and neck — morning or night.
Layer moisturizer
Follow with your usual moisturizer once it's absorbed.
Sunscreen by day
Always finish with SPF in the morning — niacinamide's results show off best with sun protection.
Who it's for
- Oily and combination skin
- Anyone fading post-acne dark spots
- People who want a real serum on a budget
- Skincare beginners building a routine
What niacinamide does — and what it doesn't
Niacinamide (vitamin B3) is one of the few skincare actives with broad dermatologist agreement behind it. It strengthens the skin barrier, regulates how much oil your skin produces, calms redness and inflammation, fades the dark marks left behind after a breakout, and over time visibly improves the look of enlarged pores. Because it's gentle and water-based, it plays nicely with almost everything else in a routine, which is why it's become a staple even for beginners.
What it won't do is work overnight or perform miracles. Pores don't actually 'close,' so think reduced appearance rather than disappearance; active cystic acne needs a targeted treatment; and deep wrinkles are a job for retinoids. Set the expectation at less shine, calmer and clearer-looking skin, and a more even tone over weeks — which, for under ten dollars, is a remarkable amount of return.
How to fit it into a routine (and what not to mix)
The routine is simple: after cleansing, smooth two or three drops over a dry face and neck, let it absorb for a moment, then follow with moisturizer. In the morning, always finish with SPF — sun protection is what lets the tone-evening benefits actually show, since fresh UV damage keeps making new dark spots. You can use it morning, night, or both.
A couple of practical notes. Less is more: piling on too much is the usual cause of the 'pilling' (little rolls of product) people complain about, so a few drops is plenty. The old warning about not combining niacinamide with vitamin C has largely been debunked for modern formulas, but if you use a potent vitamin C and want to be cautious, simply use one in the morning and niacinamide at night. It also layers fine before retinol or exretinoids, and can actually help offset their dryness and irritation.
Why The Ordinary's version became the default
Niacinamide isn't exclusive to The Ordinary — it's in dozens of serums at every price. What made this one the internet's default recommendation is the combination of a meaningful 10% concentration (a real, effective dose), a simple fragrance-free formula, and a price under ten dollars for a bottle that lasts months. The Ordinary's whole pitch is stripping out fancy packaging and marketing markups and selling the active ingredient close to cost, and niacinamide is the poster child for that.
The trade-off is exactly what you'd expect: plain pharmacy-style packaging and a slightly tacky finish some sensitive-skin users don't love. The 1% zinc included to help with oil can feel ever so slightly grippy. For the overwhelming majority of people, though, it's the best value entry point into 'real' skincare actives there is.
See The Ordinary Niacinamide on Amazon
Check the latest price, photos and buyer reviews on Amazon.
Check Price on Amazon →Sold and shipped by AmazonFrequently asked questions
What does niacinamide do for skin?
It calms inflammation, regulates oil, fades post-inflammatory dark marks and visibly improves pore appearance over a few weeks of consistent use.
How long until I see results?
Most people see less shine and clearer skin in 2-4 weeks; pore and dark-spot improvements take 8-12 weeks.
Can I use it with retinol or acids?
Yes — niacinamide layers well with most actives. If irritation appears, alternate AM/PM instead of stacking.
Will it replace my moisturizer?
No — it's a serum. Always follow with a moisturizer, and SPF in the morning.
Can you use The Ordinary Niacinamide every day?
Yes — most people use it once or twice daily. If your skin is sensitive, start once a day and build up as it tolerates it.
Does niacinamide help with acne?
It won't replace a dedicated acne treatment, but by calming inflammation and regulating oil it reduces the look of breakouts and helps fade the dark marks they leave behind.
As an Amazon Associate, TopCrate earns from qualifying purchases at no extra cost to you. The image above is illustrative; price, availability and current ratings are shown on Amazon and are subject to change.
