Talc is often contaminated with asbestos during the mining process. Even though Johnson & Johnson's own internal documents makes it clear they detected the presence of cancer-causing asbestos in their talc, they have been covering up these test results for decades. 

Internal documents spanning at least 40 years show a paper trail by Johnson & Johnson that proves that not only was the company aware that their talc-based products had tested positive for asbestos, but that they actively covered up negative results including limiting sample sizes for tests – both internally and externally – of asbestos in their products. All the while, Johnson & Johnson targeted marketing assaults against minorities and women.