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Recent research led by the University of New South Wales has unveiled alarming insights into the potential health hazards of vaping, particularly its association with lung and oral cancers. The comprehensive review, published in the journal *Carcinogenesis*, highlights early warning signs of malignancy linked to e-cigarette use, including DNA damage and inflammation. Experts urge immediate regulatory action rather than waiting for decades to establish definitive cancer risks.
Vaping and Cancer: A Growing Concern
The study synthesised evidence from a wide range of sources, including animal experiments, human case reports, and laboratory analyses conducted between 2017 and 2025. Co-author Adjunct Professor Bernard Stewart emphasised that inhaling e-cigarette vapour distinctly alters the cells and tissues in both the oral cavity and lungs. While e-cigarettes are often marketed as a safer alternative to traditional tobacco, the findings raise critical questions about their long-term safety profile.
Despite the modern e-cigarette’s introduction in the early 2000s, there remains a lack of extensive longitudinal data specifically linking vaping to cancer development. Many users of e-cigarettes also smoke tobacco, complicating efforts to isolate the effects of vaping alone. Consequently, the study did not attempt to quantify the likelihood of cancer development among vapers but focused instead on identifying biological changes that could predispose individuals to cancer.
Evidence from Case Reports and Animal Studies
The researchers noted concerning case reports from dental professionals who observed instances of oral cancer in individuals who had never smoked but had only vaped. Additionally, animal studies indicated that mice exposed to e-cigarette vapour exhibited a higher incidence of lung tumours compared to their unexposed counterparts. While caution is warranted in extrapolating these findings directly to humans, the implications are troubling.
The lead author, epidemiologist Associate Professor Freddy Sitas, drew parallels to the historical recognition of smoking as a cause of lung cancer, which took nearly a century of evidence accumulation before the US Surgeon General made a formal declaration in 1964. “We risk repeating that same fate with vaping if we don’t take emerging research and warning signs seriously,” cautioned Calvin Cochran, a research fellow at the University of Otago’s Department of Public Health.
The Need for Regulatory Action
The consensus among researchers is clear: the time for decisive action is now. While some experts, such as Professor Stephen Duffy from Queen Mary University London, caution against equating the harms of vaping with those of smoking, Stewart insists that the health risks of vaping must be evaluated independently. He pointed out that although vaping does not involve combustion and its associated carcinogenic products, it should not be dismissed as a safe alternative.
Professor Becky Freeman, a tobacco control researcher at the University of Sydney, reinforced the study’s assertion that vaping is likely associated with an increased risk of cancer compared to non-users. This information is particularly crucial for young individuals who have never smoked, as it underscores the need for stringent regulations to prevent their access to vaping products.
Why it Matters
The implications of these findings extend beyond individual health, encompassing broader public health policy and the protection of vulnerable populations, particularly youth. As vaping becomes increasingly prevalent, it is imperative that regulators, health organisations, and policymakers take a proactive stance in addressing the potential risks associated with e-cigarette use. With evidence mounting against the safety of vaping, the goal should be to ensure that vaping does not emerge as another public health crisis, akin to the legacy of smoking. By prioritising research and implementing informed regulatory frameworks, we can better protect future generations from the dangers of smoking and vaping alike.
