Vaping may not contain tobacco, but that doesn't mean it's harmless. E cigarettes still expose your lungs to nicotine and a mix of chemicals that have been linked to lung disease, heart issues, Nicotine in e cigs: addictive, increases your risk of heart disease The Verge CDC provides update on e cigarette illnesses AHA News E Cigarettes and Pregnancy Maternal Infant Health CDC Vaping Nicotine May Increase Heart Failure Risk By Almost 20%, Study Suggests