No matter what nic level you use, it's easy to control the amount you absorb at any given time. If you puff and exhale, nic absorption is going to be low. The lungs don't absorb much since the droplets in the mist don't make it down to the small bronchial alveoli. If you want to absorb more, hold it in your mouth for a few seconds and then exhale. For even more nic, hold it in your mouth, then inhale just far enough to be able to exhale slowly through your nose. You will bring even more mucous membranes into play.
Vapor in the lungs does little besides irritate the lungs, although doing so does recreate the act of smoking a cigarette.
Vapor in the lungs does little besides irritate the lungs, although doing so does recreate the act of smoking a cigarette.