The state of Arizona has filed a consumer protection lawsuit against L’Oreal, marking the first time a U.S. state government has taken direct legal action against a cosmetic manufacturer over the alleged failure to warn consumers about cancer risks associated with chemical hair straighteners. According to a Reuters report, Arizona Attorney General Kris Mayes filed the complaint against L’Oreal and its U.S. subsidiary on September 13, 2026.
Arizona Lawsuit Targets L’Oreal Over Chemical Hair Straighteners
According to the complaint filed by Arizona Attorney General Kris Mayes, L’Oreal sold chemical hair straightening products without warning consumers about potential links to ovarian and uterine cancer, violating state consumer protection laws. The state is asking the court to issue an injunction halting sales of the products unless cancer risk warnings are added, alongside demands for civil penalties and financial restitution. The legal action contends that cosmetic corporations prioritized profits over consumer safety by capitalizing on long-standing social pressures and beauty standards.
Federal Multidistrict Litigation and Upcoming Trials in Chicago
The Arizona state lawsuit joins a wave of federal litigation consolidated in the U.S. District Court for the Northern District of Illinois in Chicago. According to court records, more than 12,000 similar lawsuits from across the United States have been brought together into a multidistrict litigation (MDL) proceeding to streamline pretrial processes. The first federal trials stemming from this consolidated litigation are scheduled to begin next year. The products at the center of these legal challenges include straightener brands such as Dark & Lovely and Optimum, which have been predominantly purchased by Black women.
Scientific Studies and Corporate Defense Arguments
The surge in litigation follows a 2022 study published by the U.S. National Institutes of Health (NIH), which found that women who used chemical hair straightening products more than four times a year faced a rate of uterine cancer more than double that of non-users. Following the publication, affected consumers and their families initiated numerous lawsuits seeking compensation for medical expenses and product costs, naming manufacturers such as L’Oreal, Revlon, and SoftSheen-Carson as defendants. L’Oreal USA spokesperson countered the claims by defending the safety of their products and stating that the plaintiff’s assertions lack legal and scientific backing. According to the company, the NIH study failed to prove a direct causal link between using the products and developing cancer, a position echoed by Revlon in denying any association between its products and cancer diagnoses.
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