Health Effects of Vaping Smoking and Tobacco Use CDC Psychiatry.org E Cigarettes and Vaping Vapes aren't just harmless mist or vaporthey can contain addictive nicotine and chemicals that can harm your lungs, brain, and overall health. Knowing the facts = making informed choices. It's important to 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