I know that weight gain is a side effect of quitting smoking. I don't know if it's because your metabolism slows down, or you just eat more because you're not suppressing your appetite with smokes.
Most often it's the hand to mouth habit. Once they aren't taking a cigarette and putting it in their mouth, many people tend to replace that by taking food and putting it in their mouth. Nicotine is also an appetite suppressant which gives smokers who quit a double whammy.
But that isn't an issue with vaping since you aren't eliminating the nicotine, just all the rest of the crap in smoking while still fulfilling the hand to mouth habit with a PV.
Another benefit of vaping is flavor choices which allows one to also fend off specific cravings, like for sweets.
I'm diabetic and since I switched to vaping, I've found it much easier to keep my blood sugar under control with less meds as I no longer "cheat" when my sweet tooth goes nuts as I just vape something sweet instead.
There's also quite a few savory flavors out there. But for some reason those flavors don't seem to be very satisfying (or pleasant) when vaped for most people. My guess is that texture is often a major part of savory foods and not having that when you vape it reduces it's ability to satisfy.
