Does vaping cause cancer? Roseburg Community Cancer Center E cigarettes are not a healthier alternative to cigarettes. They contain nicotine and many harmful ingredients that can cause cancer and heart disease. Since these products are relatively new, we don't know all Vaping and smoking together increases lung cancer risk fourfold New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Evidence update on the cancer risk of vaping e cigarettes: A systematic review