 The studies discuss pulmonary issues, lung cancer, and ovarian cancer.One of these, published in 1993, was a US National Toxicology Program report, which found that cosmetic grade talc containing no asbestos-like fibres was correlated with tumor formation in rats forced to inhale talc for 6 hours a day, five days a week over at least 113 weeks.A 1971 paper found particles of talc embedded in 75% of the ovarian tumors studied.