The Ordinary Niacinamide 10% + Zinc 1% Smoothing Serum
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What it is
The Ordinary Niacinamide 10% + Zinc 1% Smoothing Serum is a lightweight, water-based treatment built around one of the most studied actives in modern skincare. At 10% niacinamide paired with 1% zinc PCA, it delivers a clinically relevant concentration in a no-frills formula at an accessible price point — the kind of straightforward approach The Ordinary has become known for. It absorbs quickly and layers well under moisturizer or SPF.
Who it's for
This serum is a strong fit for oily, combination, and acne-prone skin types dealing with visible pores, sebum overproduction, post-breakout dark marks, or uneven texture. People struggling with congestion and recurring breakouts will find the zinc component especially useful, as it helps regulate surface oil and creates a less hospitable environment for blemish-forming bacteria.
Those with very dry or sensitized skin should approach with some caution: niacinamide at 10% is well-tolerated by most people, but a small subset experiences mild flushing or irritation, particularly when layering with vitamin C-based products. If you have reactive skin, patch-test first and consider introducing it gradually — three times a week before moving to daily use.
How to use it
Apply two to three drops to clean, dry skin after cleansing and any water-based treatments, but before heavier creams or oils. In a standard morning routine, it fits after toner and before moisturizer and SPF. In the evening, it works well before a richer moisturizer or a targeted spot treatment. The Ordinary recommends once or twice daily use; most people see the best results with consistent daily application over four to eight weeks.
A practical note: avoid mixing this serum directly with pure vitamin C (ascorbic acid) in the same routine step. Both actives are effective independently — use one in the morning and the other at night to keep each working at full potency without any risk of interaction.
Key ingredients
Niacinamide (10%) is a form of vitamin B3 with a broad body of research behind it. At this concentration, it helps visibly reduce the appearance of enlarged pores, regulate excess sebum production, fade post-acne hyperpigmentation by interrupting melanin transfer to skin cells, and strengthen the epidermal barrier over time. It is also one of the few brightening actives suitable for daily use across most skin tones without risk of irritation at prescribed doses.
Zinc PCA (1%) works in tandem with niacinamide to help control sebaceous activity and reduce surface shine. Zinc has established antimicrobial and anti-inflammatory properties that make it a practical addition for acne-prone skin — it does not strip the skin, but helps moderate the conditions that lead to breakouts.
The formula also contains vitamin C as a supporting ingredient, contributing antioxidant protection and reinforcing the brightening action of niacinamide against dark spots and uneven tone.
Pros & cons
- High active concentration: 10% niacinamide is an effective, research-backed dose — not a trace amount added for marketing.
- Broadly compatible: The lightweight, water-based base layers cleanly under almost any moisturizer, SPF, or makeup.
- Addresses multiple concerns at once: Pores, oil control, and hyperpigmentation in a single step.
- Exceptionally well-reviewed: With a 4.7-star average across tens of thousands of verified reviews, real-world satisfaction is unusually strong for a serum at any price.
- Fragrance-free and vegan: Minimal irritant risk for most skin types.
- Not ideal for dry or dehydrated skin on its own: The formula targets oil control, not hydration — dry skin types should pair it with a good moisturizer.
- Pill risk when layering: Like many thin serums, it can ball up if applied under silicone-heavy products or applied before fully absorbing.
- No built-in hydration: Unlike some serums that blend niacinamide with hyaluronic acid, this formula keeps it simple — beneficial for oily skin, less so for those needing moisture support.
How it compares
If your primary concern is brightening rather than oil control, TruSkin Vitamin C Serum with Hyaluronic Acid & Vitamin E takes a different angle — it leads with ascorbic acid and adds hyaluronic acid for simultaneous hydration, making it a better fit for drier or normal skin types chasing a more radiant, dewy result. It addresses hyperpigmentation more aggressively via vitamin C oxidation, but is generally less suited to oily or congested skin than a niacinamide-first formula.
For a niacinamide serum with added humectant support, Tree of Life Hyaluronic Acid Serum is worth a look if dryness is also a concern alongside uneven tone — though it does not match the 10% niacinamide concentration here.
The verdict
The Ordinary Niacinamide 10% + Zinc 1% Smoothing Serum earns its reputation as one of the most reliable entry points into active skincare. It does what it says — reduces the look of pores, steadies oil production, and fades post-acne marks with consistent use — without unnecessary filler ingredients or inflated claims. It is not a total routine in a bottle: dry skin types will need a solid moisturizer alongside it, and it won't replace a dedicated exfoliant for texture work. But for oily, acne-prone, or hyperpigmentation-prone skin looking for a dependable, well-formulated daily serum, this is a hard pick to argue against.
What shoppers say
Shoppers with acne-prone, combination, and textured skin consistently credit this serum with visibly minimizing pores, calming breakouts, and fading post-acne dark spots over several weeks of daily use. Many appreciate the clean, fragrance-free formula that absorbs without a sticky or heavy feel, making it easy to layer into an existing routine.
A few reviewers note that meaningful results require patience—often six to eight weeks of consistent use—so those expecting rapid change may be disappointed. A small number also found it worked better as a standalone step rather than mixed with other actives.
This toner has worked miracles for my skin texture. I have suffered from acne for a long time and have struggled to find the right combination of products to help my skin and not make it worse. This toner, in combination with the same brand of moisturizer, has helped IMMENSELY. The redness of my skin and the size of my pores have gone down. I noticed a big difference within around a week. I know everyone’s skin is different, and believe me, I know that products that work for one person will not always work for another. However, for me personally, this product with the moisturizer has done its job, and I am a repeat buyer and will continue to be. The product is pretty much scentless, feels good on my face , and takes a very small amount to cover my whole face. Another bonus factor is the included dropper- this makes the application of the product VERY easy, and I feel like I waste a lot less product. The only ‘negative’ was that when I initially used this product alone my skin was a bit dried out, BUT I just added the same brand’s moisturizer and my skin feels almost flawless. I DO still have some acne but the amount is way less, and nothing else has come close to helping as much as this has. Last thing I'll say is if you're considering it and are unsure, just do it ! You literally cannot beat the price (I know I have tried COUNTLESS products way more expensive than this) and if your skin dries out a bit this company makes great moisturizer that does not seem to clog my pores- try it !
Read on Amazon ↗I’ve been using The Ordinary Niacinamide 10% + Zinc 1% consistently for several weeks now, and it has genuinely earned a permanent place in my skincare routine. As someone with blemish-prone and combination skin, I’m always cautious when introducing new products—but this serum has exceeded my expectations in both performance and value. First, the texture is lightweight and water-based, which makes it easy to layer with other skincare products. It absorbs quickly without leaving a greasy or sticky residue (as long as you don’t over-apply). I use just 2–3 drops for my entire face, and that’s more than enough. It sits well under moisturizer and sunscreen during the day and works seamlessly into my nighttime routine. What really impressed me is how visibly it helped balance my skin. Within the first couple of weeks, I noticed a reduction in excess oil production—especially in my T-zone. My skin looked less shiny throughout the day, and my pores appeared more refined. Over time, it also helped calm down active breakouts and reduced the frequency of new ones. While it’s not a miracle overnight fix, it works steadily and reliably. The 10% niacinamide concentration feels effective without being overly harsh. I experienced very minimal irritation, and that was only when I accidentally used too much product. Once I adjusted the amount, my skin tolerated it beautifully. The addition of zinc seems to support oil control and overall skin clarity, making it especially helpful for acne-prone or congested skin types. Another major advantage is the price point. The Ordinary is known for affordable, ingredient-focused skincare, and this serum delivers high performance without the luxury markup. It feels like you’re getting a clinical-grade formula at a fraction of the cost of similar products. Constructively speaking, beginners or those with sensitive skin may want to start slowly—perhaps once a day—to ensure their skin adjusts well to the higher concentration of niacinamide. Also, applying too much can sometimes cause a slight pilling effect, so less truly is more with this product. Overall, I would highly recommend The Ordinary Niacinamide 10% + Zinc 1% to anyone struggling with oiliness, enlarged pores, or frequent breakouts. With consistent use, it helps create a smoother, more balanced, and healthier-looking complexion. It’s simple, effective, affordable, and delivers exactly what it promises—which is honestly everything I look for in a skincare product.
Read on Amazon ↗I bought this niacinamide serum mainly to improve the appearance of enlarged pores, especially in my T-zone and around my nose, as I have combination skin and noticed they became more visible over time. After using it consistently for about 1.5–2 months, I can say I did see results. My skin tone looks more even, and while the serum doesn’t completely remove enlarged pores, it does make them noticeably less visible—even in photos. The price is very reasonable, and the product lasts a long time. I use it almost every day, morning and evening, and after nearly two months I still have about half the bottle left, so one bottle can easily last 2–3 months. One downside is that I noticed some crystallization forming around the rim of the bottle, so it’s important to keep it clean and properly closed. Also, avoid applying it on the lips or too close to the eye area. Overall, I’m happy with the results and think it’s a good, budget-friendly option for improving skin texture and tone.
Read on Amazon ↗this is a great product i've been using it for years! i used to have blemish prone skin and get acne flare ups but using this has helped quite a bit and even has helped with the hyperpigmentation left behind after having acne. there is no fragrance and no reside left behind. it goes on clear. make sure to not overdo it, use less to begin with because if you use too much it can cause a rash. so start slowly and then you can work your way up. the bottle size lasts about 2-4 months depending on use. super effective for scarring and redness too. a great buy and great value for the price! only 4 bucks! can be drying to skin if overused.
Read on Amazon ↗I literally just started using it for 2 days day and night and I already see such a huge difference with my pores!!! Its cheap, affordable, and it works. I also use other korea skin care brands and this is the only one that has changed the appearance of my cheek pores. Wow.
Read on Amazon ↗Reviews are from verified Amazon customers, shown for reference. We don't edit or endorse individual reviews.
The Ordinary Niacinamide 10% + Zinc 1% Smoothing Serum: frequently asked questions
What is The Ordinary Niacinamide 10% + Zinc 1% serum good for?
This serum targets oily skin, enlarged pores, uneven skin tone, and blemishes. The 10% niacinamide works to regulate sebum production, visibly minimize pores, and fade post-acne dark spots over time, while 1% zinc PCA helps control surface oil and supports a clearer complexion.
It's a solid everyday treatment for anyone dealing with congestion, shine, or hyperpigmentation — especially from acne scarring.
How often should I use The Ordinary Niacinamide 10% + Zinc 1%?
You can use it twice daily — morning and evening — after water-based serums and before heavier moisturizers or oils. Most people see visible results in four to eight weeks of consistent use. If you're new to niacinamide at this concentration, start once daily to see how your skin responds before increasing frequency.
What should you not mix niacinamide with?
Niacinamide is generally well-tolerated alongside most actives. The old concern about mixing it with vitamin C causing flushing has largely been debunked at modern formula concentrations. That said, avoid layering it simultaneously with high-strength direct acids (like The Ordinary's AHA 30% + BHA 2%) in a single routine, as this can cause irritation — just use them at different times of day.
Can niacinamide fade dark spots?
Yes, with consistent use. Niacinamide inhibits the transfer of melanin to skin cells, which gradually lightens post-inflammatory hyperpigmentation and sun-related dark spots. Results typically take six to twelve weeks and are more noticeable on fresh, recent spots than older, deeper discoloration. For stubborn hyperpigmentation, pairing this serum with a dedicated vitamin C product like TruSkin Vitamin C Serum with Hyaluronic Acid & Vitamin E can improve results.
What are the side effects of this serum?
At 10%, some users experience mild redness or flushing when first starting, particularly those with sensitive skin. Breakouts during the first one to two weeks are also reported, though this often settles as skin adjusts. Persistent irritation is uncommon but possible. If redness doesn't subside, consider spacing out applications or switching to a lower-concentration niacinamide formula.
Is niacinamide good for wrinkles?
Niacinamide can support overall skin texture and firmness by boosting keratin and collagen-supporting proteins, but it's not a primary wrinkle treatment. This serum is formulated to address oiliness, pores, and uneven tone — not fine lines as a first priority. For dedicated anti-aging, a retinol or peptide serum would be a more targeted choice, though niacinamide complements those treatments well.
Which goes first — retinol or niacinamide?
Apply niacinamide first. Use it directly after cleansing and toning, allow it to absorb for a minute or two, then follow with your retinol. This order lets each formula penetrate effectively. Niacinamide also helps buffer some of the dryness and irritation that retinol can cause, making it a genuinely useful pairing — not just a layering formality.
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