The Food and Drug Administration has approved the use of bemotrizinol (BEMT) in sunscreens. The chemical has been used in European and Asian brands of sunblock for decades. BEMT can provide better sun protection and last longer while being less greasy on the skin.
New kid in the block
Sunscreens are supposed to protect against both ultraviolet A (UVA) and B rays (UVB). UVB is “high-energy radiation that is typically associated with sunburns and can cause genetic mutations that lead to skin cancer,” said Scientific American. UVA rays have also “increasingly become recognized as relevant for skin health,” and their “longer-wavelength radiation” can “penetrate deeper into the skin than UVB, breaking down the skin’s structure and creating harmful, skin‑aging molecules.” Unfortunately, while most U.S. sunscreens are effective against UVB radiation, they “provided significantly lower UVA protection with the average unweighted UVA protection factor just 24% of the labeled SPF,” said a 2021 study.
BEMT, though, is capable of ”protecting against both ultraviolet A and B rays while not leaving white streaks associated with mineral-based sunscreens,” said The Associated Press. The ingredient is “generally recognized as safe and effective for use in sunscreens by adults and children 6 months of age and older,” said the FDA. “For too long, American consumers have been applying sunscreen and believing they were fully protected, not knowing that their product was delivering far less UVA protection than the label implied,” Alexa Friedman, a senior scientist at the Environmental Working Group, said in a statement.
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Screening issues
There have been many efforts to get the government to approve new sunscreen ingredients, but they were “bogged down for decades by the FDA’s bureaucratic system for updating its lists of safe nonprescription drug ingredients,” said the AP. Bemotrizinol’s approval marks the “first ingredient to go through a streamlined process authorized by Congress in 2020.”
Sunscreen is an important step in preventing skin cancer, but there has been a mounting anti-sunscreen movement “amid an increasing distrust of the medical establishment and a desire by some for natural alternatives,” said The Washington Post. Much of the concern has surrounded chemical sunscreens, which get absorbed into the skin. In 2019, scientists from the FDA found that these sunscreens’ ingredients can stay in the body at unsafe levels after just one day of use. Bemotrizinol is “broad-spectrum and far more stable, so it doesn’t break down in the sun,” said NBC News. It “also has low levels of absorption into the body.”
