They conclude that: The levels of ionic metals and metalloids, including chromium, nickel, and antimony, increased as the number of puffs increased, whereas concentrations of ionic zinc, copper, and lead were elevated at the start, and each device had different emissions
"In 1950, the Federal Trade Commission (FTC) investigators had decided that king-size cigarettes, like Embassy, contained 'more tobacco and therefore more harmful substances' than are found in an ordinary cigarette," SRITA said
Correspondingly, emissions levels between the first few puffs and the steady state increased by a factor of 10 or more in some cases, depending on the device, the battery voltage, and the emitted compound
It took a long time later, and the same thing can be told or said about debt, where the norm is, if you want to be financially independent, then you cant have debt
And yes, its common to put on a few pounds but its neither systematic nor irreversible