Talcum powder can be easily inhaled into the lungs and, worse, has been linked to cancer in some studies (although the relationship between cancer and consumer products with talc still isn't clear). Family doctors don't recommend the regular use of talcum powder for adults or, especially, babies. Instead, stock up on Gold Bond powder. London says it has cornstarch to help absorb moisture as well as other anti-fungal ingredients (her teen boys can't live without it).
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