These brands have been around for close to a century and benefit from the billions of dollars spent on R&D and manufacturing by Big Tobacco companies
Whilst the focus is on e cigs and regulation and big tobacco and pharma manipulations - vapers in the mean time need to look at what it they are vaping - it is the quality of the e-liquid that may or may not affect you long term
This happens when the mouths soft tissue becomes thick, white, and leathery from irritation
Ben (not his real name), a 19-year-old Zyn user who lives in Missouri, admits that he only heard about the pouches a few months ago, thanks in part to media attention, social and otherwise
If, however, your humidifier runs on tap water, it likely has dissolved minerals, such as salts, that can end up aerosolized once the water evaporates
It looks like chance