Most vapes contain dangerous chemicals that can harm your lungs, heart and brain, but did you know that the very act of vaping and sucking in air could in itself lead to Vaping may look harmless, but your smile tells a different story From yellow stains and dry mouth to early decay and gum damage vaping silently attacks your teeth and gums Health Effects of Vaping Smoking and Tobacco Use CDC Can Vaping Cause Lung Cancer? Here's What We Know.