Naturally occurring silicate mineral (any group of substances containing negative ions composed of silicon and oxygen) of magnesium. Current, extensive research indicates there is no increased risk of lung cancer when using talc-based products or for those involved in the manufacture of talc products (Source: Occupational and Environmental Medicine, January 2006, pages 4–9), although there is epidemiological evidence that frequent use of pure talc over the female genital area may increase the risk of ovarian cancer (Sources: International Journal of Cancer, November 2004, pages 458–464; and Anticancer Research, March-April 2003, pages 1955–1960). However, a study review in Regulatory Toxicology and Pharmacology (August 2002, pages 40–50) stated that “Talc is not genotoxic, [it] is not carcinogenic when injected into ovaries of rats.… There is no credible evidence of a cancer risk from inhalation of cosmetic talc by humans.”