Makeup company L’Oréal S.A. issued a recall on all lots of acne cream Effaclar Duo due to concern that benzene, a known carcinogen, is in the product. One year ago Valisure, an independent Connecticut testing lab, flagged acne products with benzoyl peroxide, like L’Oréal’s, could contain benzene. Valisure called upon the Food and Drug Administration…