When individuals consume meals, especially those high in fats and sugars, there is an increase in the release of dopamine, a neurotransmitter that enhances feelings of pleasure and satisfaction
Chronic exposure to this smoke causes metaplastic alterations to the respiratory mucosa with an increase in the number and size of goblet cells and consequent increase in upper airway secretion.17,18 Cohen et al.13 and Kreindler et al.19 also showed in vitro that exposure to cigarette smoke inhibits chloride transport in epithelial cells, causing physiological alterations similar to those found in patients with cystic fibrosis
[28] The medical community was criticized for its slow response to these findings
It's a fair question
Table of Contents E-cigarettes have been around for a while now (1), and like every technology there have been trends that come and go
They did not appear to smoke more cigarettes at a sitting, or to inhale more deeply, in an effort to compensate for the lower levels of nicotine they were getting