Health professionals claim that vaping is better for you than smoking cigarettes, but that doesn't mean it isn't harmful. According to the U.S. Food and Drug Administration (FDA), cigarette smoke contains more than 7,000 chemicals , and 70 of them are linked to cancer. People who have turned to vape pens may think that they're dodging these potentially toxic chemicals. A recent study shows that's not necessarily the case. RELATED: The #1 Reason You Gain Weight After Quitting Smoking, Says New Study In the study, which was published in the journal Chemical Research in Toxicology , researchers at Johns Hopkins University uncovered nearly 2,000 chemicals in the aerosols produced by an e-cigarette. Even more concerning, at least six were identified as "potentially harmful." "Existing research that compared e-cigarettes with normal cigarettes found that cigarette contaminants are much lower in e-cigarettes. The problem is that e-cigarette aerosols conta