Baby powder

Baby powder is an astringent powder used for preventing diaper rash and for cosmetic uses. It may be composed of talc (in which case it is also called talcum powder), corn starch or potato starch. It may contain additional ingredients such as fragrances. Baby powder can also be used as a dry shampoo, cleaning agent (to remove grease stains), and air freshener.

Health risks
Talcum powder, if inhaled, may cause aspiration pneumonia and granuloma. Severe cases may lead to chronic respiratory problems and death. The particles in corn starch powder are larger and less likely to be inhaled.

Some studies have found a statistical relationship between talcum powder applied to the perineal area by female babies and the incidence of ovarian cancer, but there is not a consensus about causality. In 2016, more than 1,000 women in the United States sued Johnson & Johnson for covering up the possible cancer risk associated with its baby powder. In 1975, an official at the US federal Food and Drug Administration stated that "No mother was going to powder her baby with 1% of a known carcinogen irregardless [sic] of the large safety factor" as a comment on the testing methodology that J&J backed. The company stopped selling talc-based baby powder in the United States and Canada in 2020 and has said it will stop all talc sales worldwide by 2023, switching to a corn starch-based formula. However, Johnson & Johnson says that its talc-based baby powder does not contain asbestos and is safe to use.