Caloric intake applies to what we eat, not breathe. Contrary to popular belief, just looking at or smelling something tasty and fattening will not add on the pounds. You may be dealing with water retention, a gradual addition of extra muscle, or what I'm currently going through -cold season padding.
Well, there are some ingredients in the e-juice which probably contain calories because they are organic. However, this doesn`t mean that we get these calories because as we know, we don`t eat the e-juice we just vape its smoke.