Best Korean Tranexamic Acid Serums Available in the US for 2026

How we ranked these Korean TXA serums

Tranexamic acid, often shortened to TXA, is popular in Korean brightening serums because it can sit alongside niacinamide, arbutin, glutathione, vitamin C derivatives, centella, and hyaluronic acid without feeling like a peel. For women 35-55, that matters. Dark spots may be from sun exposure, post-blemish marks, hormonal shifts, or years of inconsistent sunscreen, but the wrong brightening serum can make mature skin look drier before it looks more even.

We did not test these products in a lab or run a BeautySift panel. We analyzed 10 Amazon US product listings, 37,611 total Amazon ratings, US retailer availability, brand ingredient disclosures, and PubMed evidence on topical tranexamic acid in melasma research. The strongest PubMed support in our source set comes from 2020 J Cosmet Dermatol papers evaluating topical TXA formats, including a randomized comparison involving 4% topical tranexamic acid and 4% hydroquinone. That evidence supports TXA as a legitimate discoloration ingredient, but it does not prove that every Amazon serum will perform like a prescription or procedure-assisted protocol.

Our scoring gave the most weight to disclosed active percentages, rating volume, texture language, irritation risk, and value. We penalized formulas that did not disclose TXA percentage, relied heavily on brand-funded claims, or paired TXA with a high active load that could be too much for reactive mature skin.

1. Anua Niacinamide 10 + TXA 4 Serum

Anua earns the top position because it has the largest review base by a wide margin: Amazon US lists 4.5/5 across 14,793 ratings in our May 2026 snapshot. The active disclosure is also unusually clear for this category. The product page names 10% niacinamide, 4% tranexamic acid, and 2% arbutin, which gives shoppers a concrete reason to compare it with other dark-spot serums instead of relying on vague brightening language.

For mature skin, the formula architecture is practical. Niacinamide supports the look of tone and texture, arbutin adds another discoloration-targeting pathway, and ceramides plus hyaluronic acid help offset the dryness that can come with brightening routines. Amazon review excerpts we captured repeatedly referenced dark spots, acne marks, quick absorption, and a non-sticky finish. That does not equal clinical proof, but it does suggest the serum is wearable enough for daily sunscreen layering.

Skip it if 10% niacinamide makes your skin flush, sting, or feel tight. If your barrier is already compromised, start twice weekly and use a bland moisturizer before moving to daily use.

2. SKIN1004 Tone Balancing Capsule Ampoule

SKIN1004 ranks second because it combines a strong Amazon signal with the best size value in this set. Amazon US lists 4.6/5 across 8,708 ratings and a 3.38 fl oz bottle at $13.58 in our snapshot. That price-per-ounce advantage is meaningful if you want to treat the neck, chest, backs of hands, or forearms, where sun spots often show up after 40.

The tradeoff is disclosure. The Amazon title confirms niacinamide, centella, and tranexamic acid, but it does not disclose a TXA percentage in the title snapshot. That kept it behind Anua even though the rating average is slightly higher. Its mature-skin advantage is centella and hydration: review excerpts described it as lightweight, moisturizing, non-heavy, and wearable under makeup. For a shopper who has already overdone retinoids or exfoliating acids, that comfort profile may matter more than maximum active strength.

Choose this if you want a gentle-feeling brightening ampoule and good value. Skip it if you specifically want 4%, 5%, or 6% TXA printed on the listing.

3. medicube TXA+Niacinamide 15% Glow Facial Serum

medicube is the strongest high-disclosure pick. The Amazon page lists 5% tranexamic acid, 10% niacinamide, 2% arbutin, 10-layer hyaluronic acid, panthenol, and betaine. It also lists 4.6/5 across 2,467 ratings. That combination makes it a serious option for shoppers who want more than a soft glow serum.

The brand also cites a clinical test with 15.6% radiance improvement after one use and 7.5% texture improvement after one week. We treat that as brand-funded support, not the same as an independent dermatology trial. Still, it gives the formula a defined claim rather than generic brightening language. Mature skin may appreciate the humectant and panthenol base, especially if the serum is used under sunscreen in the morning.

The main caution is intensity. A formula with TXA, 10% niacinamide, and arbutin can be efficient, but it can also be too active if your skin is dry, rosacea-prone, or already using retinal. Introduce it slowly.

4. numbuzin No.5 Vitamin Concentrated Serum

numbuzin No.5 is the value surprise. Amazon lists 4.5/5 across 5,089 ratings, while the product title discloses 4% tranexamic acid and 5% niacinamide. At $12.99 in our snapshot, it costs less than many serums with smaller review bases and less transparent active disclosure.

Its formula is not minimalist. The listing adds glutathione, vitamin C, panthenol, and ceramides to the TXA-niacinamide base. That can be useful if you want one brightening step instead of stacking several serums. It can also be less ideal if your skin reacts easily and you need to isolate ingredients. For mature skin, the panthenol and ceramide mentions are a plus because they point toward comfort rather than a purely aggressive pigment routine.

This is the pick for budget shoppers who still want an evidence trail. It is not the pick for someone who wants to add only one new active and know exactly what caused a reaction.

5. PURITO TXA 6% + Niacinamide 10% Facial Serum

PURITO has the highest disclosed TXA level in this ranking: 6% tranexamic acid, paired with 10% niacinamide. Amazon lists 4.4/5 across 831 ratings. The listing also mentions encapsulated retinal, which makes this a more complicated choice than a standard brightening serum.

For experienced users, that active blend may be appealing. Dark spots, post-blemish marks, rough texture, and fine lines often overlap after 40, and a TXA-niacinamide-retinal approach speaks to that overlap. But the same overlap increases irritation risk. If you already use a separate retinoid, do not automatically stack this nightly. Use it as your retinoid-adjacent step or pick a TXA serum without retinal.

We ranked it fifth because the active profile is compelling and the price is reasonable, but the rating base is smaller than the leaders and the formula is not beginner-friendly.

6. COSRX 2% Alpha Arbutin Discoloration Care Face Serum

COSRX is a good middle-ground choice for shoppers who want a familiar Korean brand and a broad pigment-support blend. Amazon lists 4.5/5 across 1,131 ratings. The page discloses 2% alpha-arbutin and names tranexamic acid, niacinamide, glutathione, and ferulic acid.

The reason it does not rank higher is simple: the Amazon title does not disclose the TXA percentage. In a category where Anua, medicube, numbuzin, PURITO, TOSOWOONG, and haruharu wonder all give clearer TXA percentages, that matters. Still, COSRX may be a sensible option if you want a fast-absorbing serum from a brand with broad US availability and a reputation among acne-prone shoppers.

For mature skin, the best use case is discoloration plus post-breakout marks, especially if you do not want a heavy, oily finish. Patch test first; the product page itself recommends it.

7. Dr.Althea Vitamin C Boosting Serum

Dr.Althea is more of a brightening glow serum than a focused TXA treatment. Amazon lists 4.6/5 across 2,805 ratings, the highest star average tie in this set, and the title names tranexamic acid. The page also highlights 640,000 ppm Hippophae Rhamnoides water, niacinamide, centella leaf water, a lightweight finish, and no artificial fragrance.

That profile fits mature skin that looks dull or tired but does not want the sting, smell, or oxidation anxiety of a classic L-ascorbic acid serum. It is also a reasonable sunscreen-prep serum because the texture language is light and hydrating. The limitation is transparency: the listing does not provide a TXA percentage in the title or top bullet snapshot we reviewed.

Choose it for glow and comfort. Choose a higher-ranked option if your top concern is stubborn brown spots and you want more exact active disclosure.

8. JUMISO 20% Niacinamide Dark Spot Serum

JUMISO is the most aggressive niacinamide pick here. Amazon lists 4.5/5 across 788 ratings, and the page describes a 20% niacinamide formula with TXA and glutathione. It also cites a brand study reporting up to 27.7% improvement in the appearance of skin clarity and up to 20% improvement in the look of redness after 2 weeks.

That sounds persuasive, but we score brand-funded data below independent PubMed evidence. We also treat 20% niacinamide as a real tolerability question. Some oily and combination skin types love high niacinamide for shine and pore appearance. Many dry, mature, or barrier-impaired faces do not.

The best audience is someone who already uses 10% niacinamide without irritation and wants a stronger pore-and-tone serum. If you are new to actives, start elsewhere.

9. TOSOWOONG Niacinamide 10% + Tranexamic Acid 4% Serum

TOSOWOONG looks like the budget alternative to the Anua structure. Amazon lists 4.4/5 across 533 ratings, and the product page discloses 10% niacinamide, 4% tranexamic acid, 2% arbutin, ceramide NP, and hyaluronic acid. At $15.37 in our snapshot, it undercuts Anua while keeping a similar active concept.

The reason it ranks lower is evidence volume. A few hundred ratings can still be useful, but it is not the same signal as Anua’s 14,793-rating base or SKIN1004’s 8,708-rating base. For a shopper who prioritizes price and ingredient disclosure, TOSOWOONG is worth considering. For someone who wants the most battle-tested Amazon choice, Anua remains the safer bet.

The formula is fragrance-free according to the listing, which is a plus for mature skin, but any 10% niacinamide plus TXA serum still deserves a slow start.

10. haruharu wonder 4% TXA Gel Serum

haruharu wonder closes the ranking because it has a clear 4% TXA disclosure, a comfortable gel-serum concept, and centella support, but a smaller Amazon evidence base: 4.4/5 across 466 ratings. The formula also includes niacinamide and vitamin C positioning, with an airless pump that may appeal to shoppers who dislike droppers.

The gel texture is its mature-skin advantage. Thin, watery brightening serums can disappear too quickly on skin that is dry from menopause, retinoids, or winter heating. A gel serum can feel more cushioning without becoming greasy. That said, the product page language leans enthusiastic, so we focused on the concrete details: 4% TXA, niacinamide, centella, vitamin C positioning, and Amazon rating data.

Pick this if texture comfort is more important than maximum review volume. Skip it if you want the strongest evidence base or a bottle with thousands of reviews.

What to know before using TXA for dark spots

The PubMed evidence supports tranexamic acid as a credible discoloration ingredient, but over-the-counter serums still work slowly. The 2020 J Cosmet Dermatol studies in our source list looked at melasma protocols, not casual use without sunscreen. In real routines, the difference between a helpful brightening serum and wasted money is often daily UV protection.

Use a Korean TXA serum once daily at first, preferably under moisturizer and sunscreen in the morning or on nights when you are not using retinoids. If the formula contains high niacinamide, retinal, vitamin C, or multiple pigment actives, start 2 to 3 times weekly. Mature skin often needs consistency more than intensity.

Do not use these products as a substitute for a dermatologist visit if you have rapidly changing pigmentation, patchy discoloration around the mouth or eyes, or melasma that worsens despite sunscreen. Cosmetics can improve the look of uneven tone; they do not diagnose or treat medical pigment disorders.

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