After years of everyone using Johnson’s baby power they now link it to cancer. They are trying to say no but are willing to pay out 100 million dollars http://www.bbc.com/news/world-us-canada-35648252 http://www.smh.com.au/national/health/is-talcum-powder-going-to-give-you-cancer-20160224-gn31zm.html
Any fine powder inhaled poses a possible threat, IMO. If not of future malignancy, then distress of the fine apparatus which allows GASES (mainly Oxygen and Carbon Dioxide) to pass through thin membranes, into and out of, the blood flowing within the enclosed membranes, which are capillaries. The lungs are fantastically-able to provide a lifetime of service if not abused, whether intentionally, or otherwise. I sensed that fact while a teenager, and resisted the peer impulse which drove many of my friends to start smoking. Never once touched a cigarette to my lips, but did "smoke" two "Tiparillos" once.