Tranexamic Acid: New Evidence for Hyperpigmentation
A newer brightening ingredient with surprisingly strong clinical evidence. What it is, what it does, and how it compares to vitamin C and niacinamide.
Tranexamic acid (TXA) is a relative newcomer to skincare that has gained strong clinical backing for melasma and post-inflammatory hyperpigmentation. It works differently from most brighteners: rather than blocking melanin production directly, it inhibits plasmin — an enzyme that triggers the chain of signals causing pigment cells to overproduce melanin in the first place.
- Effective concentration range: 2–5% topical. More is not always better.
- Best evidence is for melasma, where it has outperformed kojic acid in some trials.
- Also used orally at prescription doses — a different application for heavy menstrual bleeding, not skincare.
- Pairs well with niacinamide and vitamin C for a layered brightening approach.
- Generally well tolerated; less irritating than hydroquinone, which it may eventually replace for many patients.
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