Bemotrizinol: The Asia-and-EU Sunscreen Filter Americans Have Wanted for Years
The workhorse filter inside your favorite K- and J-beauty SPF may finally reach US shelves - here's what bemotrizinol does and why its absence held US sunscreen back.
On December 12, 2025, the FDA issued a proposed administrative order to add bemotrizinol (Tinosorb S), a broad-spectrum UVA/UVB filter long used in Korean, Japanese and European sunscreens, to the US OTC monograph - the first proposed new US sunscreen active in more than two decades.
The FDA frames the proposal as expanding the list of sunscreen active ingredients available to Americans, while consumer-health advocates have long argued that better filters support better protection against UV damage.
Questions we get a lot
What is bemotrizinol used for in sunscreen?
Bemotrizinol, also known as Tinosorb S, is a broad-spectrum UV filter that absorbs both UVA and UVB rays. The FDA's December 12, 2025 proposal would add it to the US over-the-counter sunscreen monograph. It has been used in Korean, Japanese and European sunscreens for years.
Why do people say US sunscreen lags Asia and Europe?
Consumer-health advocates point out that the US has approved far fewer modern UV filters than Korea, Japan and the EU, leaving American formulas reliant on older actives. Bemotrizinol has been a staple abroad for years. Advocates describe the FDA proposal as a long-sought step toward parity.
Will bemotrizinol be in US sunscreens soon?
The December 12, 2025 action is a proposal, not a final approval, so it does not immediately put bemotrizinol on US shelves. The FDA describes it as expanding the sunscreen active ingredient list, but a final order is still required. Timelines depend on the agency completing its process.
r/AsianBeauty: 'My Korean sunscreens have used Tinosorb S forever and they're so elegant - is this the filter that's finally coming to American SPF?'