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 Australian researchers have issued one of the strongest warnings yet about vaping, saying a major review of evidence suggests e cigarettes are likely to cause lung and oral cancer. The review found signs Today's Fact Friday highlights an important truth. Both cigarettes and e cigarettes are harmful to your health. While some believe vaping is a safer alternative, studies show that one disposable vape can equal Vaping, Environmental Toxicants Exposure, and Lung Cancer Risk