Natracare tampons were developed as a direct response to health and environmental concerns about dioxin pollution caused by chlorine bleaching, the extensive use of pesticide spraying on conventionally grown cotton, and the use of rayon and other synthetics in tampons. Dioxin, a toxic carcinogen, is a by-product of all chlorine bleaching methods and is also found throughout the environment in varying levels as a by-product of pesticide spraying and pollution from incinerators. Dioxin has been found to collect in the fatty tissues of animals, including humans and should, therefore, be a real concern for women.