31/05/2026
A major new scientific review found that ni****ne based e-ci******es are carcinogenic to humans, driving up risks for oral and lung cancers.
A comprehensive global review published in the journal Carcinogenesis has delivered a stark warning about the long-term safety of electronic ci******es.
Led by cancer researchers at UNSW Sydney, the study assessed clinical data, animal experiments, and laboratory research to determine the direct health impacts of va**ng independent of traditional to***co.
The findings indicate that e-cigarette aerosols contain potentially carcinogenic compounds—such as formaldehyde, acetaldehyde, and heavy metals like nickel and lead—which cause DNA damage, oxidative stress, and chronic inflammation. These physiological changes occur directly in oral and respiratory tissues, leading researchers to conclude that ni****ne-based vapes are likely to cause both lung and oral cancers.
Public health experts, including former Baltimore Health Commissioner Dr. Leana Wen, urge the public to recognize that 'safer than smoking' does not mean safe. Although e-ci******es avoid the combustion-related toxins of traditional to***co, ni****ne itself remains highly addictive and can promote tumor growth and blood vessel formation. With e-ci******es yet to be approved by the FDA as smoking cessation tools, experts warn that dual use is highly common and that many people switch systems without breaking their ni****ne dependency. Because va**ng has only been popular for roughly two decades, definitive long-term epidemiological data on human cancer rates will take decades to fully mature, but the immediate biological cellular damage is already clear.
source: Hetter, K. (2026). Va**ng is often touted as less toxic than smoking. But new research raises concerns about cancer risk.CNN.