You certainly habituate to a certain level of nicotine. If you increase it over time you habituate to that new level, and the reverse is also true. If you slowly cut down you will reset what your body is used to getting in that way and can conceivably go from whatever, say 24mg down to zero over time. Then you could be vaping zero nicotine just because you still have the "ritual of smoking," aka the oral fixation thing going, which for me and many people, is the REAL addiction!
My suggestion for anyone wanting to wean themselves is to take it slow and don't set yourself up for failure. If you're at 24mg and 6ml per day, been there for weeks/months whatever, then either cape 5 mLs of that concentration for a few weeks OR try vaping 6 or 7 mLs of whatever you can find just below that, 22 or 20 or 18 mLs for a while, until you can consistently vase at that level with no withdrawal symptoms. Whichever method works for you. Some will prefer or find more success with the same nic strength and 1 mL less per day. Others by vaping the same amount of liquid and puffs at a slightly lower nic concentration. Then after you feel your body has habituated, maybe a few weeks or months, step down again. Be patient as you probably have been smoking for years and it likely took some time to ramp up to your quitting level of nicotine, it will take even longer IMO to wean down to zero comfortably, comfortably being the key word here. Gradually many of us can quit nic altogether in this manner, if we so DESIRE. If that isn't your goal and you/I/We decide not to give up nicotine altogether, rest assured that for most of us, those without heart and blood pressure conditions, high risk of stroke and coagulation disorders (clotting and/or blood vessel issues) vaping with nicotine is LIKELY not problematic. Certainly nicotine without the combustion of tobacco is much safer than those cigarettes. The research will bear this out in longitudinal studies over time. I have no doubts.
Happy vaping to you.
Carbon
