La Roche-Posay and Proactiv are among the brands affected. Popular acne treatments were recalled due to potential contamination with benzene. Research shows that long-term exposure to benzene may increase cancer risk. The U.S. Food and Drug Administration conducted benzene testing on the products after third-party testing raised concerns.

U.S. health officials are asking retailers to pull a small number of acne creams from their store shelves after government testing found they contain slightly elevated levels of a chemical associated with cancer.

Makeup company L’Oréal S.A. has issued a recall on its popular acne cream Effaclar Duo due to concern that benzene, a known carcinogen, is in the product. Last year, independent Connecticut testing lab Valisure, flagged acne products with benzoyl peroxide, like L’Oréal’s, could contain benzene, reports the New York Post.