New study compares gut bacteria of vapers, non- smokers and tobacco smokers
https://www.news-medical.net/news/20180430/New-study-compares-gut-bacteria-of-vapers-non-smokers-and-tobacco-smokers.aspx
Vapers and non-smokers have the same flourishing gut flora
https://medicalxpress.com/news/2018-04-vapers-non-smokers-flourishing-gut-flora.html