Like nicotine, menthol can contribute to blood vessel constriction and raise blood pressure, increasing the risk of heart attack and stroke
There is some data that shows high school students and young adults who vape experience higher rates of bronchitis and asthma, though it's likely too early to know about vaping and lung cancer
Taken together, DNA methylation at any given CpG is the result of multiple processes that are orchestrated as a developmental cascade involving, first, global demethylation after fertilization, then, cell/tissue-specific re-methylation during very early embryogenesis and, finally, maintenance of DNA methylation throughout the remainder of life
You are gentle, tender moonbeams
But tobacco is not such a drug, given the dangers posed by secondhand smoke, especially when adults smoke in a home with young children