New Study Shows Vaping Causes Mouth and Lung Cancer What Does the Science Say? This headline is powerful but it needs context. E cigarettes (vapes) expose users to fewer toxins than Does Vaping Cause Lung Cancer? Research and Facts Vapers May Be Less Likely to Undergo Lung Cancer Screening MedPage Today New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Vaping and smoking together increases lung cancer risk fourfold