Cosmetics companies may use any ingredient or raw material, except for color additives and a few prohibited substances, without government review or approval. About one in eight of the 82,000 ingredients used in personal care products are industrial chemicals, including carcinogens, pesticides, reproductive toxins, and hormone disruptors. To top it off, U.S. federal law allows companies to leave many chemicals off labels, including nanomaterials, ingredients considered trade secrets, and components of fragrance.The scariest of all? More than 500 products sold in the U.S. contain ingredients banned in cosmetics in Japan, Canada or the European Union. and here we are, buying this stuff up like it’s the cool thing to do.