There are some studies on the dangers of certain chemicals written by chemical safety groups for consumers. It's really a personal choice, IMO. There are a lot of other lifestyle choices that are as much concern, such as driving a car and exposing oneself to the asbestos brake dust, riding a bike on a city street and inhaling exhaust, drinking soda pop with artificial sweeteners, or even eating food made from plants and animals that arer genetically modified. Who really knows?
Even so, think of all the scents and chemicals in laundry detergents and soaps?
For instance: http://www.huffingtonpost.com/2012/0...n_1894746.html