Multiple peer-reviewed studies and health agencies, including the World Health Organization and CDC, report that Bluetooth earbuds emit 100–1,000 times less RF radiation than cell phones. Current research has not found any link between Bluetooth use and brain cancer or other neurological harm at these exposure levels.
Some claims conflate Bluetooth earbuds with cell phone risks, but controlled studies (such as those published in Laryngoscope and referenced by the CDC) find no short- or long-term adverse effects on the brain from Bluetooth EMFs. The strongest studies raising concern are based on much higher exposures from cell phones, not earbuds.
While calls for more long-term research continue, the scientific consensus is clear: Bluetooth earbuds do not pose a demonstrated cancer risk to the brain or nervous system at currently allowed usage levels.