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.

On Tuesday, the U.S. Food and Drug Administration revealed results of new agency testing of over 90 acne products containing benzoyl peroxide for possible benzene contamination. More than 90% of tested products had undetectable or extremely low levels of benzene.