Dangers of Vaping: Why E Cigarettes Are Harmful to Health WARNING E cigarettes with nicotine are highly addictive and are harmful to health. Some of their toxic substances are known to cause cancer increase the risk of heart and lung disorders. # Have you been thinking about trying vapes or e cigarettes? Think again! Most e cigarettes contain nicotine and other harmful substances. Some products claiming to be nicotine free have been found to contain nicotine. Nicotine Since their introduction in Europe in 2006 and the U.S. in 2007, the use of e cigarettes a.k.a., vapes has skyrocketed. A recent review from researchers in Australia found the results E Cigarettes: Know the Health Risks Department of Health