Clinical Studies: Proof Niacinamide Reduces Pores
Niacinamide is basically the overachiever of skincare—it brightens, hydrates, soothes, and yes, makes your pores look smaller. But is that just another overhyped beauty claim, or does science actually back it up? Spoiler: Niacinamide has receipts. Let’s dig into the clinical studies that prove this multitasking ingredient really does help with pore size.
Why Do Pores Look Bigger in the First Place?
Before we talk about how niacinamide works its magic, let’s get one thing straight: You can’t physically shrink pores. Their size is mostly determined by genetics (thanks, Mom and Dad). However, they can look bigger due to:
- Excess oil production (hello, shiny T-zone)
- Loss of skin elasticity (aging, sun damage—fun!)
- Clogged pores (buildup of dead skin and sebum = bad news)
Niacinamide helps address these issues, making pores appear smaller and skin look smoother. But don’t just take my word for it—let’s see what science has to say.
Clinical Studies That Prove Niacinamide Works
Study #1: 4 Weeks to Smaller-Looking Pores
A 12-week clinical study published in the International Journal of Dermatology found that 2% niacinamide significantly reduced sebum production in participants with oily skin. Less oil = less chance of clogged pores = smaller-looking pores.
Another 4-week study showed that 5% niacinamide improved skin texture and visibly reduced pore size by regulating oil and strengthening the skin barrier. Translation? Hydrated, happy skin without the grease overload.
Curious about how niacinamide works with other actives? Check out The Science of Active Ingredients: Niacinamide, Vitamin C & Hyaluronic Acid for the full breakdown.
Study #2: Niacinamide vs. Retinol for Pore Size
Retinol usually steals the spotlight for smoothing skin, but a split-face study comparing 5% niacinamide and 0.025% tretinoin (a retinoid) showed comparable results in reducing pore size and improving skin texture—minus the irritation and flaking that retinol can cause.
So if retinol has been too harsh for your skin, niacinamide is a gentler alternative that still delivers real results.
Study #3: Niacinamide Strengthens Skin & Reduces Oil
A 2006 study published in the Journal of Cosmetic Dermatology found that niacinamide boosts collagen production and strengthens the skin barrier. Why does this matter? Because as we age, skin loses firmness, and pores start to stretch and look bigger. By improving elasticity, niacinamide helps keep pores looking tight and refined.
Need a beginner-friendly guide to niacinamide’s other benefits? Don’t miss Niacinamide 101: Benefits, Uses & Side Effects.
How to Use Niacinamide for Pore Refinement
Want to get the best pore-refining results? Here’s how to make niacinamide work for you:
- Stick to 2-5% niacinamide – Higher percentages aren’t necessarily better and can sometimes be irritating.
- Apply it after cleansing and before moisturizer – This ensures it penetrates properly.
- Pair it with mattifying ingredients – Zinc and clay help keep oil under control.
- ALWAYS wear SPF – Sun damage weakens skin elasticity, making pores look bigger. Sunscreen is non-negotiable.
- Why Niacinamide Is a Must for Oily Skin
Since niacinamide helps regulate oil production, it’s a summer skincare essential—especially if your face turns into an oil slick by noon. If you’re looking for a plan to keep your skin matte and smooth, check out Oily Skin in Summer: Mattifying with Niacinamide.
The Bottom Line
The science is clear—niacinamide is one of the best ingredients for reducing the appearance of pores. It regulates oil, boosts skin elasticity, and improves texture without irritation. So if you haven’t added it to your routine yet, consider this your sign.
