Can cause genes to malfunction, and are commonly found in nearly all types of human cancer
The majority of vapers are ex-smokers, smoking can induce changes in DNA methylation that last long after the person has quit smoking. This is a pretty common problem in research on vaping.
https://www.businessinsider.com/vapers-show-changes-in-genome-linked-to-cancer-study-suggests-2020-2
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