A scientific review has raised fresh concerns about the long term cancer risks of vaping, concluding that e cigarettes are probably carcinogenic, while also acknowledging significant gaps in the evidence. The analysis of reviews Although research on cancer risks associated with vaping is still limited, a 2025 systematic review found substantial evidence that e cigarette exposure is associated with biomarkers reflective of cancer disease risk. This includes E cigarettes can cause cancer even when they are nicotine free, scientists claim The Mirror Breast Cancer & E Cigarettes: Is Vaping a Safer Alternative to Smoking? Maurer Foundation Teens inhale cancer causing chemicals in e cigarettes, new study shows Can vaping cause cancer? The evidence suggests it might. The Washington Post