How this page evolved

Every published version is kept. Each entry shows what changed and why. Earlier versions can be restored by moderators, but only if the material they rely on is still available.

1. Revision 4Oct 4, 2026, 4:05 PMLiveAI-organised, reviewed

   Added a 2026 systematic review of 11 randomized trials (n=7355) quantifying actinic keratosis reduction with daily sunscreen (24–51% across three trials), plus new sources on chemoprevention, homemade sunscreens, and an outdoor-worker intervention. Expanded uncertainty and open questions accordingly.

   • · The main finding was rewritten.
   • · Updated “What the evidence shows”.
   • · Updated “How to read these findings”.
   • · Added section “Use in practice and product choice”.
   • · 5 new sources cited.
   • · The note on uncertainty changed.
   • · The key takeaways were revised.
   • · 2 new pieces of guidance for specific situations.
   • · 1 new open question.
2. Revision 3Oct 3, 2026, 6:19 PM

   Added a reader poll shown alongside published survey figures.

   • · Minor wording changes.
3. Revision 2Oct 3, 2026, 6:19 PMAI-organised, reviewed

   AI-prepared Starting Map from live research.

   • · First published version.