For many years, talcum powder (talc) was used on a daily basis in barbershops and homes. While people still use the term talcum powder today, they are really referring to a product now called baby powder, which is primarily made from corn starch instead of actual talc. The product is used as an astringent to prevent or treat skin rashes and as a deodorant. Barbers brush it on customers after using a razor or electric clippers without a guard to prevent minor skin irritation.
Natural talc has the potential to be dangerous to humans for various reasons. Talc itself is properly called magnesium silicate and has been shown to cause cancer in laboratory animals. However, the larger danger is that talc is a silica compound, which forms in a deep ore environment similar to other silica compounds, such as the six silica compounds that form what we know as asbestos.
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