In December 2019 researchers from Canada published their review of the medical scientific literature to assess the association between the perineal use of talc powder and risk of ovarian cancer. A total of 30 studies were included in the review. Results showed that the perineal use of talc powder is a possible cause of ovarian cancer. A significant risk was noted in Hispanics and Whites, in women applying talc to underwear, in pre-menopausal women and in post-menopausal women receiving hormonal therapy.
Kadry Taher M et al. Critical review of the association between perineal use of talc powder and risk of ovarian cancer. Reprod Toxicol. 2019 Dec;90:88-101