uv-filterWell-Known
Tinosorb S
Also known as: Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Bemotrizinol
Medically reviewed by ChokChok · Updated April 15, 2026
The modern UV filter EU and Asia have that the US doesn't — broad-spectrum, photostable, genuinely better than avobenzone.
What It Does
Broad-spectrum UV protectionPhotostableStabilizes other filters
Deep Dive
Tinosorb S is a large-molecule photostable filter that covers both UVA and UVB ranges. It doesn't degrade under sunlight and helps stabilize other filters. The FDA hasn't approved it in the US (the approval process is punishingly slow), which is why US sunscreens lag EU/Asian ones in UVA protection. If you care about photoaging, an EU or Korean sunscreen with Tinosorb S is measurably better UVA coverage than a US avobenzone product.
Best For
CombinationDrySensitive
Pairs Well With
Effective Concentration
Up to 10% EU. NOT FDA-approved in the US — reason Asian/EU sunscreens outperform US.
