Vaping harms your health Cancer Institute NSW Teen Smoking UT MD Anderson Vaping is NOT Harmless. Know the long term effects before it's too late! Most e cigarette liquids contain high levels of nicotine, which is highly addictive. Despite the legal age being 21, vaping devices E Cigarettes and Vaping Tear Pad Health Edco Toxicological Effects of E Cigarettes on Cells, Animals, and Humans and Mechanisms of Toxicity Springer Nature Link Second hand e cigarette emissions pose health risks