I gained weight only after I starting to
vape zero nic. Guess like nicotine indeed increased metabolism rate and 'tricked' the mind of feeling not hungry. No wonder most smoker are skinny and scaly. While
vaping non-zero nic , I in-fact lost weight. ..Nowadays, I exercise more to compensate for the 'lost' in metabolism rate, and also due to better respiratory-system since analog-free.