The findings, printed this month in Important Opinions in Toxicology, arrive at a essential time for North American producers, suppliers, and regulatory stakeholders because the FDA continues its ongoing evaluate of sunscreen elements.
“For manufacturers and formulators, this evaluate additional validates avobenzone’s function as a cornerstone of broad-spectrum UV safety,” Dr. Kimberly Norman, PCPC’s senior director of security and regulatory toxicology and lead writer on the examine, informed CosmeticsDesign.
Research confirms low absorption & no important toxicity markers
The evaluate assessed each medical and nonclinical knowledge to judge avobenzone’s human well being threat profile, overlaying pharmacokinetics, toxicology, and real-world publicity knowledge from human biomonitoring and regulatory databases.
The authors concluded that “avobenzone has an appropriate security profile with none clear markers of toxicity or endpoints of concern.” They discovered “no proof of avobenzone results on immune tissues or the estrogen, androgen, or thyroid techniques,” and famous that the ingredient “has not proven any indication of genotoxicity both in vitro or in vivo.”
Importantly for formulators and regulatory affairs groups, dermal absorption was discovered to be low. “The medical knowledge point out very low percutaneous absorption in people,” at lower than 1% of the utilized dose, the authors wrote.
The evaluate established a NOAEL (no-observed-adverse-effect degree) of 450 mg/kg/day from sub-chronic oral research in rats, leading to a calculated margin of security larger than 100, which exceeds the usual thresholds for security assurance.
Findings supply readability for business and regulators
The Private Care Merchandise Council (PCPC), which sponsored the analysis, emphasised the importance of the findings for the U.S. market.
“The findings of the excellent evaluate reinforce what many years of scientific knowledge have already proven: avobenzone is a protected and efficient sunscreen ingredient,” mentioned Dr. Norman.
“At a time when shoppers are more and more scrutinizing product security and producers are navigating evolving regulatory landscapes, the findings present readability and reassurance.”
For North American producers and suppliers, the evaluate helps continued innovation inside regulatory parameters. “Shoppers, producers, suppliers and different stakeholders must be assured within the findings of this evaluate,” Dr. Norman mentioned.
Formulation implications & and the FDA evaluate course of
In the US, avobenzone is permitted to be used in OTC sunscreen merchandise at concentrations as much as 3%. It’s at present the one FDA-listed devoted UVA absorber within the Sunscreen Monograph, making it a foundational element of broad-spectrum solar care merchandise in the marketplace.
“This complete, weight-of-evidence analysis is supportive of the continued protected use of avobenzone,” Dr. Norman mentioned. “It reaffirms the protected use of the UV filter inside regulatory security necessities.”
The evaluate might also assist information the FDA’s ongoing evaluate of sunscreen lively elements. “The evaluate offers strong, science-based proof that helps its continued protected use,” she mentioned. “We hope that the analysis informs FDA’s selections by reinforcing the ingredient’s security profile and guiding future regulatory updates via balancing innovation with client safety.”
A possible mannequin for future ingredient evaluations
The examine’s methodology, which contains each conventional and non-animal testing knowledge, might function a framework for evaluating different UV filters at present underneath regulatory scrutiny.
“Sure, this evaluate units a robust precedent for a way UV filters and different sunscreen elements will be assessed utilizing present scientific methodologies, together with non-animal testing strategies, and clear processes,” Dr. Norman mentioned.
She added {that a} related method was used for one more current security analysis of sunscreen ingredient ensulizole, highlighting the business’s dedication to proactive ingredient evaluate.
Supply: Important Opinions in Toxicology, 55(6), 662–692. doi: 10.1080/10408444.2025.2535394. “Complete evaluate of avobenzone (butyl methoxydibenzoylmethane) toxicology knowledge and human publicity evaluation for private care merchandise.” Authors: Norman, Ok. G., et al.
