If you vape, you inhale a lot of harmful substances. These can damage your heart and lungs. Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN Don't junky puff your vape! Or vape at all! . Vaping may not be as bad for you as cigarette smoking (jury is still out on that), but it's still horrible for How To Smoke A Vape Like A Pro