Does Vaping Cause Lung Cancer? FDA orders Juul e cigarettes off the market in the U.S. STAT What's really inside a vape? Many people think vaping is just flavored vapor, but the aerosol from e cigarettes can contain harmful substances that go straight into the lungs. According to the Can Vaping Cause Thyroid Cancer? Risks & Thyroid Health The rise of teen vaping is worrying doctors worldwide. While e cigarettes were once marketed as a safer alternative, research shows they contain nicotine, heavy metals, and cancer causing chemicals that can damage developing