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Homosalate

HomosalateSPF filter

Chemical UVB filter. Effective and stable, but on the EU's 2022 'restricted in cosmetics' list pending hormonal-effect review.

What it does

Homosalate absorbs short-wave UVB radiation and is one of the more common chemical SPF filters in US sunscreens. It's photostable and well-tolerated by most skin types. The EU restricted it to 7.34% in 2022 (down from 10%) over endocrine-disruption concerns based on in-vitro data; the FDA has not changed its US rules. Mineral filter alternatives (zinc, titanium) avoid the question entirely if the topic concerns you.

The evidence, graded

expert consensusOxybenzone, octinoxate, and homosalate are organic UV filters with documented systemic absorption from sunscreen use. Pregnancy guidance is mixed; many derms recommend mineral filters (zinc oxide, titanium dioxide) during pregnancy as a precautionary default.Matta 2020 · JAMA ↗

Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.

Pairs worth knowing

Avobenzone · works together ↗Octinoxate · works together ↗

Read more

How Drop works · 5 minSunscreen Reapplication: Why Every 2 Hours Actually MattersSunscreen wears off faster than most people realize. What happens in those 2 hours, when reapplication matters most, and how to do it over makeup.

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