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.

Posay, and Proactiv recalled benzoyl peroxide products that may contain elevated levels of a chemical linked to 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.