Unilever United States issued a voluntary recall of several brands of dry shampoo aerosol products due to “potentially elevated levels” of benzene, a human carcinogen. According to a company announcement posted on the U.S. Food and Drug Administration (FDA) website, brands include Dove, Nexxus, Suave, TIGI (Rockaholic and Bed Head), and TRESemmé. The recalled products were produced before…