Assuming that this got down-voted because it says "contaminated", whereas the other posts here suggest that it's often used intentionally--or at least with indifference--as an ingredient.
There have been disputed allegations that contamination could have occurred and resulted in cancer.
Asbestos is a carcinogen, and it often contaminates talcs. Citation: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6784763/