This is so strange I waited a few weeks to confirm it, but it's true: after smoking 25 years and vaping 5 years, my body suddenly decided to reject nicotine! What happened is, I woke up one day feeling kind of sea-sick. Then as I went through the day, I'd feel more and more like puking, but also fidgety, getting weak legs and shaky hands. Not good... Next day, same thing. And the next. And the next. Worse, when I'd commute back home with my bike, I'd bonk in the middle of the ride and I'd have to stop for ten minutes because I just couldn't pedal anymore. That went on for a while, until I decided to go see my doc. After a few exams and blood tests, he found me a minor insulin problem due to my improper sport nutrition. I changed my diet, waited for 3 weeks (the doc said my insulin levels should return to normal within 3 weeks), and eventually I stopped feeling weak and bonking on my bike rides. But the shaky hands and sea-sickness wouldn't go away. I went back to my doc, got more tests done at the hospital... They couldn't find anything wrong with me: I'm as healthy as a horse and my glycemic levels are fine now. The docs were completely stumped, and eventually they sent me home without a solution to my problem. So I started to revisit all the things I do in my life that could cause these symptoms, and I thought: what else makes me shaky and sea-sick? Too much coffee, and the first cigarette in the morning. I don't drink much coffee and I don't smoke no more but... Bingo! Nicotine! Yet I thought, no way that's possible: I've chain-smoked and chain-vaped for so long, how could nicotine do anything to me? What's more, assuming I couldn't stand it anymore, intolerance doesn't happen overnight. Right? Still, I figured it was easy enough to investigate this avenue. I started vaping only zero-nic. And lo and behold, 12 hours later, the shakes and sea-sickness were gone. I stayed a few more weeks on zero-nic to ensure the problem was well and truly gone. And it is. Better: for the sake of experimenting, I tried vaping 3 mg in a dripper again, and sure enough, I started feeling sea-sick again within ten minutes. In fact, now when I vape nicotine, I feel *exactly* how I felt when I smoked my very first cigarette 30 years ago. I remember vividly how crappy I felt back then, and I feel exactly the same way now if I vape nic. It's as if vaping had reversed my tobacco addiction all the way to the starting point. Amazing! So there. I still enjoy vaping very much, just without the nic. Now nobody can tell me my vaping is a tobacco-related activity in any shape or form. It's just something pleasurable and non-addictive I do with my respiratory system. But crucially, now I *know* I've truly quit smoking, and I *know* vaping isn't just a crutch to get me through the day without a smoke anymore.