Bemotrizinol: the first new US filter in decades

Section 01

What actually changed

American sunscreens have been built from the same short list of filters since the late 1990s. Europe, Japan, Korea and Australia added new ones over that period; the United States did not, because the approval route effectively stalled. In June 2026 that changed, with bemotrizinol added to the rulebook and allowed in products from August.[1]

The practical effect arrives slowly. A regulatory order does not put a bottle on a shelf. Manufacturers have to reformulate, test and produce, so the filter appears gradually on labels through the following year rather than all at once.[1]

You may already have used it. Bemotrizinol has been in European and Asian sunscreens for years under other names, which is part of why the safety dossier was substantial enough to assess.[2][6]

Section 02

Why it matters more than it sounds

The weakness in American sunscreen has not been UVB, the wavelengths that burn. It has been UVA, the longer wavelengths that reach deeper, drive ageing and contribute to skin cancer without producing an obvious burn to warn you.[6][5]

Laboratory testing of American products found not only lower measured SPF than labels claimed, but proportionally weaker UVA protection still. That is a structural consequence of a short filter list, not of any one brand cutting corners.[6]

Bemotrizinol absorbs across both ranges and stays intact in sunlight. Avobenzone, the filter that has carried American UVA protection, degrades when exposed to light unless other ingredients hold it together, which is why formulation quality has mattered so much.[1][6]

Section 03

What is known about safety

The concern that dominated the previous decade was absorption. Controlled studies found that several older filters entered the bloodstream above the level at which a regulator asks for more toxicology data, and they did so within a day of normal use.[4]

Published work on bemotrizinol reports very low absorption through skin, and a maximum usage trial was registered to test it under the same demanding conditions. That is the right comparison to make, and it is the reason this filter cleared a route that others could not.[2][3]

Worth stating plainly: low absorption is not the same as proven long-term safety, and no filter has outcome data spanning decades. It is a reassuring result on the specific question that held everything up.[2][4]

Section 04

Should you switch

Not urgently. The single biggest determinant of how much protection you get is whether you apply enough and reapply, and that depends far more on whether you like the texture than on which filter is inside.[5]

The case for looking out for it is stronger if you are outdoors for long stretches, if you are treating pigmentation where UVA matters, or if you have found American products underwhelming compared with ones bought abroad.[6][5]

• Keep using a sunscreen you reapply happily over switching to one you will not.[5]
• Look for it if pigmentation or melasma is your reason for wearing sunscreen at all.[6]
• Expect it to appear gradually on labels rather than across a whole range at once.[1]

Section 05

What to expect next

One company holds an exclusivity period in the American market before others can use the ingredient freely, so early products will be limited in number and priced accordingly.[1]

Other filters that Europe has used for years remain under consideration. Whether the same route opens for them is the thing to watch, because one new filter narrows the gap without closing it.[1][6]