Anua Niacinamide 10% + TXA 4% Review: Benefits & Limitations

Dark spots are the bane of my existence. Post-inflammatory hyperpigmentation from old breakouts, a couple of sun spots from years of inconsistent sunscreen use, and general unevenness that foundation can only do so much about. I've tried vitamin C serums, alpha arbutin, azelaic acid, the whole roster. So when the Anua Niacinamide 10% + TXA 4% Dark Spot Correcting Serum showed up with its bold claim of tackling pigmentation with a niacinamide-and-tranexamic-acid combo, I was interested but cautious. After six weeks of consistent use (I extended my testing because pigmentation takes time), here's where I landed.

Reviewed and updated June 2026.

First Impressions

The 30ml bottle is a standard glass dropper design, clean, no-frills, with the same Anua aesthetic I've come to expect. The dropper works well, dispensing a consistent amount each time without suction issues. The bottle is opaque enough to protect the active ingredients from light degradation, which tells me someone was thinking about formula stability.

Anua describes the texture as watery and lightweight. Check the current product photos for its appearance; natural color and formula updates can make blanket descriptions such as “colorless and clear” misleading.

First application: 3-4 drops spread easily across my face. It absorbed in about 15 seconds without any tackiness or pilling. Under moisturizer, it disappeared completely. No white cast, no residue, no interaction issues. I've used niacinamide products that ball up under other products, this one doesn't. That was a promising start.

Key Ingredients Breakdown

Anua’s current product information lists 10% niacinamide, 4% tranexamic acid and 2% arbutin. The brand positions this combination for the appearance of dark spots and uneven tone.

The ingredient list also includes glycerin, hyaluronic acid ingredients, panthenol and ceramide NP, alongside botanical extracts and oils. Check the list on your own bottle because market versions and formulas can change.

Anua describes a fragrance-free, lightweight formula. That does not mean the product contains no potential irritants or that it will suit every sensitive skin type. Ingredient-level research and an individual review cannot establish how quickly this exact serum will work for you.

How I Used It

I used this serum twice daily, morning and evening, as my primary active serum step. I paused my vitamin C serum during the testing period to isolate the results.

Morning routine:

• Gentle cleanser
• Anua Heartleaf Toner
• Anua Niacinamide + TXA Serum, 3-4 drops, pressed into skin
• Lightweight moisturizer
• SPF 50 sunscreen (non-negotiable when treating pigmentation)

Evening routine:

• Double cleanse
• Toner
• Anua Niacinamide + TXA Serum, 3-4 drops
• Moisturizer

I want to emphasize: if you're using any brightening product and not wearing sunscreen religiously, you're wasting your time. Sun exposure triggers melanin production, which directly works against everything this serum is trying to do. SPF is mandatory, not optional.

Results After 4 Weeks (Extended to 6)

Pigmentation is slow to fade. Anyone telling you a serum will erase dark spots in a week is lying to you. I extended my testing to six weeks because four weeks isn't enough to properly evaluate a brightening product. Here's my honest timeline:

Week 1-2: No visible change in pigmentation. However, my overall skin tone looked slightly more even, and my pores appeared slightly refined. That's the niacinamide doing its thing. My skin also felt smoother, not from exfoliation, just from the hydration and barrier support the formula provides.

Week 3-4: This is when I started noticing real changes. A cluster of PIH marks on my left cheek from a breakout two months earlier had visibly lightened. Not disappeared, lightened. The edges were softer, and the overall darkness had reduced by maybe 30-40%. I took comparison photos, and the difference was clear under the same lighting.

Week 5-6: Continued improvement on the PIH marks. The spots that were lighter to begin with had faded to the point where I could barely see them without close inspection. Darker, more established spots had lightened further but were still visible. One stubborn sun spot on my right cheekbone showed minimal change, it's been there for years, and I think it needs something stronger (like professional treatment) to fully resolve.

Overall skin brightness: Beyond specific spots, my skin generally looked brighter and more radiant by week four. The kind of difference where people ask if you've changed something in your routine. That general luminosity boost is likely from the niacinamide improving overall skin function.

What it didn't do: It didn't eliminate deep, established sun damage. It didn't work on my oldest hyperpigmentation marks that have been around for years. And it didn't make my skin sensitivity-free, on two occasions, I applied it right after over-exfoliating, and I felt a mild stinging that lasted about 30 seconds. Not the serum's fault, but worth noting for sensitive types.

Who Should (and Shouldn't) Use This

This serum is excellent for:

• Post-inflammatory hyperpigmentation from acne or irritation
• General skin tone unevenness and dullness
• People looking for a gentler alternative to hydroquinone or high-concentration vitamin C
• Those willing to check the full formula and introduce a concentrated serum gradually
• Anyone wanting niacinamide's pore-refining benefits alongside brightening

Manage your expectations if:

• You have deep, long-established sun damage or melasma, this will help but may not fully resolve it
• You want overnight results, pigmentation takes months to properly address
• You're not willing to commit to daily SPF, without sunscreen, this is pointless
• You need treatment-grade intervention, severe pigmentation may require prescription products or in-office procedures

Pros and Cons

Pros

• Dual-action niacinamide + tranexamic acid formula targets pigmentation from two angles
• Clearly stated niacinamide and tranexamic acid concentrations
• Visible improvement in PIH within 3-4 weeks
• General skin brightness improvement even beyond specific spots
• No fragrance, no alcohol, gentle enough for daily use
• Absorbs cleanly without tackiness or pilling
• Pairs well with other products, no layering issues
• Pore-refining side benefits from the niacinamide

Cons

• 30ml is a small bottle, at twice-daily use, it lasts about 5-6 weeks
• Results on old, established pigmentation are modest
• Stinging or irritation is possible; tolerance varies between individuals
• Takes a full month before visible brightening results appear
• Won't fully replace professional treatments for severe pigmentation

The Verdict

Rating: 4.4 / 5 stars

The Anua Niacinamide 10% + TXA 4% Dark Spot Correcting Serum is one of the better pigmentation-targeting serums I've used at this price point. The niacinamide-TXA combo is genuinely effective for post-inflammatory hyperpigmentation and overall skin tone evening. It's gentle, it layers well, and it delivers visible results within a reasonable timeframe, as long as you're realistic about what a topical serum can achieve.

It's not going to replace laser treatments or prescription hydroquinone for severe pigmentation. But for the average person dealing with post-acne marks, minor sun spots, and general dullness? This is a strong contender. The fact that it also refines pores and improves skin texture through the niacinamide is a genuine bonus.

Will I repurchase? Yes. I've already ordered another bottle. For the combination of efficacy, gentleness, and price, it's hard to find better value in a brightening serum. It's earned a permanent spot in my routine alongside SPF and a good vitamin C.

Shop Anua Niacinamide + TXA Dark Spot Serum | Build a full brightening routine at Mirai Skin.

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