Proctor & Gamble is issuing a voluntary recall on 32 of its dry shampoo and conditioner products after detecting benzene, a known carcinogen, in some of them.
They are planning on looking at four of the six cancer types evaluated previously in a 2002 report: breast cancer, liver cancer, and non-Hodgkins lymphoma. Reportedly, epidemiological literature shows some evidence of association of these cancers with exposure to polychlorinated biphenyls, or PCBs.