For years, anyone stepping into a Paris pharmacy and comparing the sunscreen aisle to its American counterpart would have noticed something odd: shelves upon shelves of elegant, lightweight lotions promising very high UVA protection, and a comparatively sparse, mineral-heavy offering back home. That gap narrowed on Tuesday, June 9, 2026, when the U.S. Food and Drug Administration added bemotrizinol to its list of permitted over-the-counter sunscreen active ingredients, the first new entry in nearly three decades.
Bemotrizinol (also called BEMT, and to be sold in the U.S. under the brand name Parsol Shield) is not a novelty. It is the first new organic chemical filter to be granted GRASE status, joining the older chemical filters that were approved under the FDA's 1999 OTC monograph and the two mineral filters [1]. The approval lifts the U.S. list of approved sunscreen actives to 17, still well behind Europe's roster of more than 30 filters, but it is a major step toward closing a regulatory gap that has stretched for nearly three decades [1][4].
What BEMT actually does
To understand why chemists are excited, it helps to remember that the sun's ultraviolet radiation is not one thing. About 95% of UV that reaches the ground is UVA, longer-wavelength rays that penetrate deep into the skin and contribute to wrinkles, age spots, and some skin cancers, and the remaining 5% is UVB, the shorter-wavelength rays responsible for sunburn [2]. Most older American chemical filters do a reasonable job on UVB but stumble on UVA. An analysis from the Environmental Working Group, cited by Scientific American, found that U.S. sunscreens deliver only about 24% of the UVA protection suggested by their SPF labels [1].
Bemotrizinol covers what formulators call the "deeper UVA" range, the long UVA-I wavelengths from about 340 to 400 nanometers that drive much of the photoaging process (premature skin aging caused by chronic UV exposure). "What's so exciting about this new BEMT filter is that it has more coverage in that UVA spectrum," said Dr. Saranya Wyles, a dermatologist at the Mayo Clinic in Minnesota [1]. The molecule is also unusually photostable, meaning it breaks down slowly in sunlight, so it keeps working through a long day at the beach rather than degrading quickly the way older filters such as avobenzone often do [2][3]. Cosmetic chemist Kelly Dobos told TIME that "with bemotrizinol, you can reduce the number of filters and reduce the total percentage of filters" in a formulation [3]. The practical upshot is fewer chalky textures and less of the ghostly white cast that mineral sunscreens leave behind.
Why the United States fell 27 years behind
Bemotrizinol is not new. It was developed in the late 1990s by the now-defunct Swiss firm Ciba Specialty Chemicals and approved in the European Union in 2000. Canada and several other major markets approved it within the next decade, and the molecule has been used safely in sunscreens around the world for decades. The United States was the conspicuous holdout.
The reason is structural. In most of the world, sunscreens are regulated as cosmetics. In the United States, they are regulated as over-the-counter drugs, a classification that, until recently, required manufacturers to clear a slow, expensive review for any new active [3]. The application for bemotrizinol was filed in 2005 and took roughly two decades to clear [1]. The FDA evaluated concentrations up to 6%, but the bottleneck was not science; it was paperwork.
HHS Secretary Robert F. Kennedy Jr. acknowledged as much in a statement released with the approval: "Bemotrizinol has been used safely in Europe for decades, and FDA's action will increase competition and consumer confidence in sunscreen products" [2]. Then-FDA Commissioner Marty Makary had been more pointed in December 2025, saying the FDA has "historically moved too slowly in this area" [2].
The 500-dalton rule, and why size matters
For a chemical sunscreen, the central safety question has always been: does the active ingredient stay on top of the skin, or does it slip through into the bloodstream? A landmark 2000 paper in Experimental Dermatology by Bos and Meinardi proposed the so-called 500-dalton rule (a dalton being a standard unit of molecular mass). Molecules above roughly 500 daltons are generally too large and bulky to penetrate the intact outer layer of skin, the stratum corneum [10].
Bemotrizinol's molecular weight is approximately 627.81 grams per mole, comfortably above that threshold [9]. "BEMT exceeds this limit quite well. I think that's likely a large reason why the GRASE status was on the table for this particular filter," said AJ Addae, a chemist and doctoral candidate at UCLA who studies cosmetics formulations [1]. Clinical studies submitted to the FDA, which involved nearly 500 participants from diverse backgrounds, found that bemotrizinol was absorbed at very low levels, well below the threshold that triggered a 2019 FDA review of older chemical filters [2][5][6].
Size matters for a less obvious reason too. The molecule is unlikely to cause skin irritation, so the FDA approved it for adults and children as young as 6 months, the first chemical UV filter to receive that recommendation. "The current sunscreen recommendations for infants 6 months and older are mineral sunscreens containing zinc oxide and titanium dioxide, as these are less irritating on sensitive skin compared to chemical filters," explained Dr. Nisha Varadarajan, a dermatologist at Memorial Sloan Kettering Cancer Center. "Bemotrizinol would be the first chemical UV filter recommended to be used on infants due to minimal skin irritation" [2].
The CARES Act shortcut
Bemotrizinol's approval also marks a procedural first: it is the first sunscreen ingredient to use a streamlined review pathway created by the CARES Act of 2020, a pandemic-relief law that reformed the over-the-counter drug review process and lets the FDA update sunscreen monographs (the official rulebook of permitted ingredients and their conditions of use) more quickly [2][7]. The proposed order appeared in the Federal Register on December 12, 2025. Public comments closed on January 26, 2026, and the final order, OTC000039, was issued shortly after [7][8]. The 27-year wait may turn out to be a one-off.
What shoppers should look for this summer
Beginning August 9, 2026, U.S. sunscreen manufacturers can legally include bemotrizinol as an active ingredient [2]. The first product to hit shelves will be Parsol Shield, made by the Dutch firm dsm-firmenich, with an 18-month exclusivity period before competitors can launch their own formulations [2][6]. For consumers, the practical advice is straightforward. Look for "broad spectrum" on the label, the FDA designation that means a sunscreen has passed a standardized test for UVA protection. Check the active ingredients list for "bemotrizinol" or "BEMT." Until the exclusivity period ends, most bemotrizinol products will be Parsol Shield branded, but the standardized INCI name on the back will read bemotrizinol.
None of this is a substitute for actually using sunscreen. Skin cancer remains the most common cancer in the United States, expected to affect roughly 1 in 5 Americans over a lifetime, according to the American Academy of Dermatology [5]. "At the end of the day, what matters is that people wear their sunscreen, no matter what's in it," Addae said [1]. A 27-year-overdue upgrade is welcome, but the bottle only helps if you pick it up.
This article is general information, not personal medical advice. Readers, particularly those caring for infants or with specific skin conditions, should consult a dermatologist for guidance tailored to their individual risk profile.