Tranexamic Acid vs Alpha Arbutin: Which Suits Your Dark Spots?

Both help dark spots fade, but by different routes. Tranexamic acid (2 to 5% on skin) calms the signals that switch pigment on and has more research in melasma. Alpha-arbutin (up to 2% on the face) slows the pigment enzyme tyrosinase and is used for sun spots and acne marks. Both are usually gentle; neither works well without daily sunscreen, and results take 8 to 12 weeks.

Written by the Oliareen editorial teamDermatologist review: pendingLast updated: 6 November 2026How we write

How each works

**[Tranexamic acid](/ingredients/tranexamic-acid):** reduces the signals that skin cells send to pigment cells after sun and inflammation; it is also thought to act on the blood-vessel side, which matters in melasma.
**[Alpha-arbutin](/ingredients/alpha-arbutin):** slows tyrosinase, the pigment-making enzyme, so less new pigment forms.

The evidence side by side

Tranexamic acid: several trials and meta-analyses in melasma; 2 to 5% on skin (3% best studied), improvement over 12 weeks. Comparatively strong evidence.
Alpha-arbutin: lab work and a few small clinical studies, mostly combined with other ingredients. Moderate evidence.
We found no good head-to-head trial of the two.

Which one when

Fairly symmetrical patches on both cheeks (possible melasma, confirmed by a doctor): starting with tranexamic acid is reasonable.
Scattered acne marks or sun spots: either one; with ongoing acne, [azelaic acid](/ingredients/azelaic-acid) is also worth considering.
Sensitive skin: both are usually gentle; one at a time, after a patch test.

Can you use them together?

They act by different routes and are not known to cancel each other, so many products combine them. But there is no strong evidence that the combination works better. Use one for 8 to 12 weeks first; if progress stalls, consider adding the second. Both usually sit well with niacinamide too.

Common mistakes

Expecting results in 2 to 3 weeks and giving up.
Using them without sunscreen, while sun keeps making new pigment.
Crushing tablets or mixing high-strength home versions from online tips.
Starting oral tranexamic acid without a doctor.
Deoxyarbutin or alpha-arbutin above 2%; the EU safety committee does not consider these safe.

Cautions and limits

Topical tranexamic acid sometimes causes mild stinging or redness; it does not make skin more sun-sensitive. Pregnancy data for the topical form is limited. Alpha-arbutin can release traces of hydroquinone, so the EU's SCCS set limits of 2% for face and 0.5% for body; there is no pregnancy data. Melasma tends to return; no ingredient removes it for good.

Questions people ask

Which one is stronger?

There is no direct comparison. Tranexamic acid has more evidence in melasma; for ordinary marks the two are considered roughly similar. What your skin tolerates matters most.

Morning or night?

Either works at any time and neither causes sun problems. If you use it in the morning, put sunscreen on top.

Check it against your own skin

A few questions and a photo of your face tell you your skin type and which ingredients will work. Free.

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