Recent research has unveiled alarming evidence suggesting that vaping may significantly elevate the risk of developing lung and oral cancers. A comprehensive review conducted by a team from the University of New South Wales has identified early biological markers indicative of cancer risk among individuals who use e-cigarettes. This finding has prompted researchers to advocate for immediate regulatory measures to mitigate potential health risks, particularly among young people.
New Evidence on Vaping and Cancer
The review, published in the journal *Carcinogenesis*, synthesises data from a wide array of studies conducted between 2017 and 2025, encompassing animal models, human case reports, and laboratory investigations. Co-author Adjunct Professor Bernard Stewart noted that the inhalation of e-cigarette vapour alters the cells and tissues within the oral cavity and lungs, leading to pre-carcinogenic changes such as DNA damage and inflammation.
Despite the growing body of evidence, the researchers caution that definitive long-term data is still lacking, as modern e-cigarettes have only been on the market since the early 2000s. Many users also smoke traditional cigarettes, complicating the ability to isolate the effects of vaping alone. Consequently, the review did not attempt to quantify the number of individuals who may develop cancer from vaping but instead focused on the biological changes that are known precursors to cancer.
Case Reports and Animal Studies
Among the significant findings of the review were case reports from dental professionals who observed instances of oral cancer in individuals who exclusively vaped, without a history of smoking. Additionally, animal studies indicated that mice exposed to e-cigarette vapour exhibited a higher incidence of lung tumours compared to their unexposed counterparts. While such animal studies do not perfectly correlate with human outcomes, they nonetheless raise serious concerns about the carcinogenic potential of e-cigarettes.
The lead author, Associate Professor Freddy Sitas, drew parallels to the historical recognition of smoking as a cause of lung cancer, which took decades of accumulating evidence to establish. He noted, “We risk repeating that same fate with vaping if we don’t take emerging research and warning signs seriously.” This warning resonates particularly given that nearly 8,000 studies were evaluated to reach the current conclusions.
Regulatory Implications and Public Health
As public health experts weigh the implications of these findings, calls for regulatory intervention are intensifying. Calvin Cochran, a research fellow at the University of Otago, emphasised the importance of acknowledging the potential risks associated with vaping. He urged policymakers and health organisations to give serious consideration to studies that suggest a causal relationship between vaping and cancer.
Professor Stephen Duffy from Queen Mary University London cautioned against overgeneralising the findings to equate vaping with smoking. He noted that vaping lacks the combustion-related carcinogenic products found in traditional tobacco use. However, Stewart insists on the necessity of evaluating vaping’s health risks independently, rather than merely contrasting them with smoking.
Professor Becky Freeman, a tobacco control researcher at the University of Sydney, echoed the urgent need for regulatory frameworks that limit access to e-cigarettes, particularly for young people who have never smoked. “Vaping is not a safe alternative to smoking for nonsmokers,” she stated, reinforcing the notion that policies should prioritise health protection.
Why it Matters
The implications of this research are profound. As vaping becomes increasingly prevalent among youth and non-smokers, the urgent need for comprehensive regulation is clear. The potential health risks identified in this study underscore the importance of informed public health policies that not only restrict access to e-cigarettes for minors but also ensure that those seeking to quit smoking are provided with safer and more effective alternatives. The evidence suggests that vaping may not be the benign option it was once thought to be, and as such, a proactive approach is essential to safeguard public health.
