Vaping Impairs Vascular Function, Even Without Nicotine, Study Finds If you vape, you inhale a lot of harmful substances. These can damage your heart and lungs. Vaping Produces Far Less Second Hand Nicotine Than Smoking Respiratory Therapy 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