evidence: - Either way, wearing a wired headset or Bluetooth headphones is a good way to reduce radiation. [...] So when he fields questions from concerned family members about how radiation might affect their cancer risk, as they hold cellphones to their ears and put Bluetooth devices on day after day, he takes their concerns seriously. [...] If you are still concerned and want to reduce your exposure to cell phone radiation, wearing a Bluetooth headset or headphones helps. (Both Ansari and the California Department of Public Health recommend this.)