Tranexamic Acid Is Not a Bleach. Heat Still Writes the Patch.

Ingredients · Published 2026-09-20 · 11 min read · 2299 words

Topical TXA can lower contrast on melasma over twelve weeks. It will not outrun a hot car, Highveld visible light or a clear SPF with no iron oxides.

Key takeaways

• Twelve weeks of topical TXA beats a seven-day bleach claim.
• Heat and visible light retrigger pigment on SA commutes.
• Tinted iron-oxide SPF is the other half of the bottle.
• Oral TXA is a medicine, not a serum you import.

Source: Isaacs et al. IJD 2025 / TXA hyperpigmentation reviews / Mahmoud visible-light darkening (https://pmc.ncbi.nlm.nih.gov/articles/PMC12712754/)

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