Most of the ingredients in shampoo “may” cause health concerns. The word “may” is used because most chemicals have never been tested. Of the more than 80,000 chemicals registered and used in the U.S. since World War II, fewer than 500 have ever been properly studied for their effects on humans and the environment. So it’s hard to say exactly how dangerous it is to use shampoo every day.
In May, 2008, Jane Houlihan, director of research for the Environmental Working Group, reported on the dangers of cosmetics and personal care products to a House subcommittee. She believes that these products, including shampoo, are the biggest source of human exposure to dangerous chemicals. According to Houlihan, “companies are free to use almost any ingredient they choose in personal care products, with no proof of safety required.” Consumers are not properly warned of possible dangers because of a “lack of standards and labeling loopholes.” Let’s just say that the less you hang out with any of these chemicals, the better off you are, we all are.