I don't know about anyone else, but it was my body that told me. I started at 36mg/ml, then after a few months went to 24mg/ml. Stayed there for 6 months or so, then went to 18mg/ml. Had no intention of going lower, but after a couple of years my body said it was too much, dropped to 12mg/ml, then shortly after that to 6mg/ml, which is where I am at now and have been for a while. I vape all the time, if I am awake that is

, but don't miss it if I am in a situation were I can't vape for several hours. I feel I could go to zero nic and not notice it, but I think from some stuff I read, that nic is really good for brain function, and I need all the help I can get.