Australian study links vaping to lung and oral cancer risk
Consensus Summary
An Australian review by UNSW researchers published in 2025 concluded that nicotine vapes likely cause lung and oral cancer, based on animal studies, human biomarkers, and case reports like a 19-year-old with vaping-related oral cancer. The findings, spanning evidence from 2017–2025, identified DNA damage and inflammation as early warning signs, though no definitive epidemiological link exists yet. Both sources agree Australia’s 2024 pharmacy-only vape sales law targets smoking cessation but cite enforcement gaps and black market risks, where nicotine-laced vapes are mislabeled. Experts warn vaping is not safer than smoking, with harmful chemicals like formaldehyde and carcinogens present even in nicotine-free products. While the Guardian cautioned against overstating harm compared to smoking, ABC emphasized the urgency for stricter regulation and public awareness, noting parallels to the delayed recognition of smoking’s dangers. Contradictions arise in framing—ABC leans on cautious language about causation, while the Guardian underscores the need for immediate policy action despite incomplete data.
✓ Verified by 2+ sources
Key details reported by multiple sources:
- A new review led by researchers from the University of New South Wales (UNSW) found nicotine-containing vapes are likely to cause lung and oral cancers, based on evidence from 2017–2025.
- The review analyzed mouse studies, human biomarker studies (oxidative stress, epigenetic changes, inflammation), and case reports, including a 19-year-old man with oral cancer after extensive vaping.
- Australia’s federal government in 2024 restricted vape sales to pharmacies for smoking cessation or nicotine dependence management only.
- Black market vapes in Australia often contain nicotine despite labels claiming otherwise, according to Alexander Larcombe (Curtin University).
- The review did not establish a definitive epidemiological link between vaping and cancer but identified biological markers (DNA damage, inflammation) linked to cancer risk.
Points of Difference
Details reported by only one source:
- Lead author Bernard Stewart noted that definitive proof of vaping causing cancer may take decades, comparing it to the 100-year timeline for smoking.
- Becky Freeman (University of Sydney) emphasized the need to minimize future harm by supporting quit vaping efforts and restricting supply, citing enforcement gaps in Australia’s laws.
- Alexander Larcombe highlighted that nicotine-free vapes still contain harmful substances like formaldehyde, acrolein, and cytotoxic flavorings (cinnamaldehyde).
- The ABC reported the Federal Department of Health did not respond to inquiries about vape restrictions before deadline.
- The study was published in the journal *Carcinogenesis* on Tuesday, with co-author Adjunct Prof Bernard Stewart citing DNA damage and inflammation as early warning signs.
- Calvin Cochran (University of Otago) warned of the risk of dismissing vaping research like earlier smoking warnings, comparing it to the 7,900+ studies needed to prove smoking’s link to lung cancer.
- Prof Stephen Duffy (Queen Mary University London) called it an 'overinterpretation' to equate vaping harm directly with smoking due to lack of combustion products.
- The Guardian explicitly stated the review did not measure cancer incidence but assessed pre-carcinogenic biological changes.
Contradictions
Conflicting information between sources:
- ABC reported Dr Stewart said 'there is still no epidemiological link' between vaping and cancer, while the Guardian framed the review as finding 'likely' cancer risk without definitive numbers.
- The Guardian noted Prof Duffy called equating vaping harm to smoking an 'overinterpretation,' but ABC did not include this nuance in its summary of risks.
- ABC emphasized Dr Stewart’s caution that 'definite proof will take decades,' whereas the Guardian focused more on the urgency for regulators to act despite incomplete data.
- The Guardian explicitly stated the review did not quantify cancer risk (e.g., incidence rates), but ABC implied the review provided 'strongest evidence' of causation without specifying limits.
- ABC highlighted Dr Larcombe’s claim that 'nicotine-free' vapes are 'definitely not safe,' while the Guardian did not quote this exact phrasing but acknowledged their harm.
Source Articles
Vaping likely to cause lung and oral cancer, Australian researchers find in new review of evidence
‘There is no doubt that the cells and tissues of the oral cavity, the mouth and the lungs are altered by inhalation from e-cigarettes,’ academic says Get our breaking news email , free app or daily ne...
Vaping likely to cause cancer, new Australian review of evidence finds
Nicotine-based vapes are likely to cause lung and oral cancer, according to a new review of evidence. Experts say there needs to be tougher enforcement of vape laws in Australia....