Best Tranexamic Acid Serum: 5 Picks Checked Against the Melasma Research

The best tranexamic acid serum for most people is Paula's Choice Clinical Discoloration Repair Serum, which states 3% tranexamic acid, the same strength tested against hydroquinone in a melasma trial, plus 5% niacinamide. Naturium Tranexamic Topical Acid 5% is the best value at $20.99, SkinCeuticals Discoloration Defense is the splurge with 3% tranexamic acid and 1% kojic acid, and Good Molecules Discoloration Correcting Serum is the budget pick, though it uses a tranexamic acid derivative and does not state how much.

Before you buy, you can scan a serum's barcode or photograph its label with the ingredient scanner in Pori to check it against your skin type and see what else is in the bottle. Pori reads the label; it does not diagnose melasma or any other skin condition.

Quick picks

• Best overall: Paula's Choice Clinical Discoloration Repair Serum ($52 for 1 fl oz, Dermstore): every active percentage is disclosed, and the 3% TXA matches published research.
• Best value: Naturium Tranexamic Topical Acid 5% ($20.99 for 1 fl oz, Target): the highest stated strength here, with kojic acid and niacinamide, fragrance-free.
• Best splurge: SkinCeuticals Discoloration Defense ($115 for 1 fl oz, Dermstore): 3% TXA, 1% kojic acid and 5% niacinamide, all stated on the box.
• Best budget: Good Molecules Discoloration Correcting Serum ($11.99 for 1 fl oz, Target): a short, unscented formula with 4% niacinamide and a TXA derivative.
• Best spot treatment: Replenix Tranexamic Acid Dark Spot Corrector ($49 for 0.5 fl oz, Dermstore): made to dab on individual spots, though no percentages are given.

We compared published ingredient lists, brand claims and listed prices; we did not test these products on skin. Prices are US list prices as of November 2026, with the retailer named, and they change often. For how TXA works and what the trials measured, read our full guide to tranexamic acid for hyperpigmentation.

How do the best tranexamic acid serums compare?

What does the evidence say about tranexamic acid serums?

The research is mostly on melasma, and it is promising but small. Two trials did most of the work:

• 3% TXA: In a 12-week split-face trial that enrolled 50 women, of whom 39 finished, a 3% tranexamic acid solution applied twice daily lowered melasma scores about as much as 3% hydroquinone with 0.01% dexamethasone on the other cheek. Side effects such as redness and dryness were less frequent on the TXA side.
• 5% TXA: In a randomized, double-blind trial of 60 women, 5% TXA twice daily for 12 weeks lowered the Melasma Area and Severity Index by a similar amount to 2% hydroquinone. No side effects were reported with TXA, against about 10% with hydroquinone.

A 2017 meta-analysis of 11 studies with 667 participants found that TXA lowered melasma scores, alone and as an add-on to standard treatment, with minor side effects such as transient irritation. A melasma review from the same year found topical TXA less effective than the oral form, with mixed results as a stand-alone treatment and better results in combination. DermNet describes topical 5% TXA as still under investigation, with promising results in epidermal melasma.

So keep expectations in proportion. Twelve weeks of twice-daily use plus daily sunscreen is the realistic test. The evidence for post-acne marks and sun spots is thinner than for melasma. If you are not sure which kind of pigment you have, our guides to melasma vs. sun spots and post-inflammatory hyperpigmentation can help.

What concentration of tranexamic acid should you buy?

Look for a serum that states its tranexamic acid percentage, and compare it with the 3% and 5% used in the trials above. Of the five serums here, two state 3%, one states 5% in its name, and two give no figure at all. Higher is not proven to be better: we found no study showing that more than 5% works faster.

Also check the ingredient name. Most serums use tranexamic acid itself. Good Molecules uses cetyl tranexamate mesylate, a derivative attached to a fatty chain. That is a different molecule from the TXA in the trials above, so their results do not transfer directly; treat it as a lighter, less proven option.

The pill form is a separate matter. Oral tranexamic acid is a prescription medicine, studied separately in a review of oral TXA for melasma. That conversation belongs with a dermatologist.

Which tranexamic acid serums are best?

Paula's Choice Clinical Discoloration Repair Serum: best overall

This serum states all three actives: 3% tranexamic acid, 5% niacinamide and 0.5% bakuchiol. Dermstore's listing shows niacinamide second and tranexamic acid fourth on the ingredient list, in a light emulsion with caprylic/capric triglyceride, milk thistle oil and tocopherol. It is listed as fragrance-free and suitable for all skin types, including sensitive. The directions say to start up to three times a week and build to twice a day. Dermstore lists 1 fl oz at $52; it showed as sold out there when we checked, so look at other retailers too.

Who it suits: melasma-prone or uneven skin, including sensitive skin, and anyone who wants to know exactly what strength they are using. Who should skip it: people who react to niacinamide or plant oils. The catch: with three actives in one bottle, it is hard to tell which one is helping if your skin improves, or which one is to blame if it stings.

Naturium Tranexamic Topical Acid 5%: best value

Naturium's serum has tranexamic acid third on the list, after water and isopentyldiol, followed by kojic acid, niacinamide, licorice root extract, panthenol and sodium hyaluronate. Target lists it at $20.99 for 1 fl oz, fragrance-free, vegan and labeled for all skin types including sensitive. The 5% is in the product name; the brand calls the other percentages proprietary.

Who it suits: anyone who wants the highest stated TXA strength at a drugstore price. Who should skip it: anyone who has reacted to kojic acid before. The catch: some reviewers report the serum turning brown, and the brand says color variation is normal. Shake it before use, as the directions say. Our kojic acid guide explains that ingredient.

SkinCeuticals Discoloration Defense: best splurge

Dermstore's listing gives 3% tranexamic acid, 1% kojic acid, 5% niacinamide and 5% HEPES, a buffering agent, in a fragrance-free formula for all skin types. The directions are 3 to 5 drops twice a day, followed by SPF 50 or higher in the morning. Dermstore lists 1 fl oz at $115.

Who it suits: people who want a fully disclosed, well-known formula and do not mind the price. Who should skip it: anyone sensitive to propylene glycol, which is on the list, or to kojic acid. The catch: the brand's results, such as a 60% reduction in brown patches, appear in product images without study size or method. Kojic acid may also turn the serum amber over time, which the brand says does not affect it.

Good Molecules Discoloration Correcting Serum: best budget

This is a short, ten-ingredient formula: water, propanediol, glycerin, niacinamide, cetyl tranexamate mesylate, cetearyl alcohol, two plant gums, caprylyl glycol and ethylhexylglycerin. Target lists 1 fl oz at $11.99, unscented, vegan and cruelty-free, with 4% niacinamide stated in the description.

Who it suits: beginners who want a cheap, gentle brightening serum, and people who already do well with niacinamide. Who should skip it: anyone treating melasma who wants the form of TXA used in the trials. The catch: the derivative and its strength are both undisclosed, so most of the evidence above does not apply directly. The Target page also says "contains tea tree oil," which does not appear in the ingredient list; check the box.

Replenix Tranexamic Acid Dark Spot Corrector: best spot treatment

Replenix designed this to be applied directly on dark spots, morning and evening. Dermstore lists tranexamic acid, niacinamide, a vitamin C complex and alpha arbutin, fragrance-free, at $49 for 0.5 fl oz, and recommends it for normal, combination and oily skin.

Who it suits: a few isolated spots or post-acne marks on oily or combination skin. Who should skip it: melasma, which spreads in patches and usually needs whole-area treatment, and dry skin. The catch: no percentages are published, and the brand's 91% figure comes from 22 people using the whole Replenix routine, not this product alone.

What else fades dark spots if TXA is not enough?

TXA is one tool among several. Azelaic acid is a good choice for post-acne marks and deeper skin tones, and niacinamide is a gentle daily support. Our best dark spot serum roundup compares the options by active, and our guides to azelaic acid, alpha arbutin and how to fade dark spots cover the rest. Whatever you choose, pair it with daily broad-spectrum sunscreen, as every product here directs, because sun exposure keeps darkening pigment. Melasma also responds to visible light and hormones; see melasma causes and triggers.

How we chose

We looked for serums sold at full size by US retailers that list tranexamic acid or a derivative, with a published ingredient list and no added fragrance. We ranked clearly stated percentages that match the 3% to 5% used in trials above undisclosed blends, and we flagged derivatives and missing figures. We read each brand's ingredient list and claims and checked prices on the retailer site named, in November 2026. We did not wear-test any product. The evidence summary comes from the trials and reviews cited above and in our tranexamic acid guide. If your pigment changes quickly, bleeds or looks unlike your other spots, see a dermatologist before treating it at home.