E-cigarettes are battery-operated devices that produce an aerosol the user inhales and exhales. They come in a wide range of forms, from products that closely resemble traditional cigarettes to sleek devices that look more like a pen or a tech gadget, and they deliver nicotine in a way that many people assume is significantly less dangerous than smoking a cigarette.
That assumption is where the problem begins.
While e-cigarette aerosol does not contain every harmful substance found in tobacco smoke, it is not clean air. The aerosol typically contains nicotine, which is highly addictive and has been shown to harm the developing brains of teenagers and children. For pregnant women who vape, it poses risks to fetal development as well. Some e-cigarette products actually deliver higher levels of nicotine than traditional cigarettes, not lower.
Beyond nicotine, the aerosol has been found to contain diacetyl, a chemical linked to a serious and irreversible lung disease, along with cancer-causing chemicals, volatile organic compounds, and heavy metals including nickel, tin, and lead. People nearby when someone vapes face secondhand exposure to those same substances, and the liquid used in e-cigarettes has caused poisoning in children and adults through swallowing, skin contact, and eye exposure.
E-cigarettes have also been connected to thousands of cases of serious lung injury in the United States, some of which have been fatal.
The argument that vaping helps smokers quit
One of the most common arguments made in favor of e-cigarettes is that they can serve as a tool for people trying to stop smoking. The evidence for that claim is far less solid than the marketing around it suggests.
Research indicates that many people who use e-cigarettes to try to quit smoking end up doing both simultaneously, a pattern known as dual use. Rather than replacing cigarettes, vaping becomes an addition to them. The American Heart Association recommends proven tobacco cessation methods over e-cigarettes for anyone trying to quit, noting that e-cigarettes have not been established as an effective quitting tool.
The threat to young people is the most urgent concern
The tobacco industry spent more than 8.2 billion dollars on marketing in 2019 alone, a figure that works out to more than 22 million dollars a day. A significant portion of that effort targets young people. In 2021, nearly 76% of middle and high school students reported exposure to tobacco product advertising, and approximately 74% had encountered e-cigarette content through social media.
E-cigarettes are now the most common form of tobacco use among children and teenagers in the United States, with more than 2.1 million young people currently using them. Flavored products are a major driver of that uptake. Among youth who currently vape, close to 9 out of 10 use flavored e-cigarettes, a detail that directly reflects industry decisions about how to make these products more appealing to younger users.
The U.S. Surgeon General has described e-cigarette use among young people as a public health concern. The American Heart Association shares that characterization and has called for regulatory action including treating e-cigarettes the same as other tobacco products under existing law, removing all flavors including menthol, incorporating vaping into smoke-free laws, and enforcing the federal minimum age of 21 for tobacco product sales.
The broader risk that rarely gets discussed
Perhaps the most significant long-term threat posed by vaping is one that has nothing to do with any individual user’s health. The growing normalization of vaping among young people risks reversing decades of progress in reducing smoking rates. If vaping makes the act of inhaling nicotine seem ordinary again, it could draw a new generation toward tobacco products more broadly, including traditional cigarettes.
Smoking remains the leading preventable cause of death in the United States, responsible for more than 480,000 deaths each year. The gains made in reducing smoking rates over the past several decades represent one of the most significant public health achievements of the modern era. Allowing those gains to erode because a new nicotine delivery system was successfully marketed as safe would be, as health advocates have described it, catastrophic.
The long-term effects of e-cigarette use are still not fully understood. What the existing science makes clear is that vaping is not a safe or healthy alternative to smoking, and that the populations most at risk from treating it as one are the same populations the industry has most aggressively pursued.