I'm 16 I've been vaping and smoking ever since I could remember but I've found that it helps when you satisfy the cravings e.g. in the morning but it's short lived. If your vaping purely for the effect on your stutter then I must I form you that your making a stupid choice that could lead to a lifelong addiction. The only reason you should be vaping is to quit smoking I think I started smoking between 9-10 years old and took up vaping at 13 so I can live a little longer.