Procter & Gamble issued a voluntary recall of more than 30 dry aerosol hair products on Dec. 17, after benzene, a chemical linked to cancer, was detected in them. The recall includes 32 products from brands such as Pantene, Herbal Essences, Aussie, and Waterless, which are produced and distributed nationwide in the United States. A full list of the recalled products can be found on the U.S. Food and Drug Administration (FDA) website. Benzene is a colorless or light yellow liquid chemical that is highly flammable. It causes cells not to work properly and attacks the immune system. In humans, it can lead to anemia, while long-term exposure to high levels of benzene can cause leukemia and cancer of the blood-forming organs. According to the Centers for Disease Control and Prevention (CDC), benzene is a natural part of crude oil, gasoline, and cigarette smoke and is widely used. Exposure to …