Wow, this is all very informative. I have a doctor's appt tomorrow for my checkup (they have to test my blood every 6 months to make sure I'm getting the right synthroid dosage, for the past 30 years now... (Grave's Disease was the original diagnosis, then radiation, kill the thyroid, now take meds for the rest of your life thing...) He'll do other tests just to make sure I'm not diabetic or having liver failure, or high cholesterol, blood pressure (all the things that run in my family) yadda yadda

They want to make sure we are healthy

and keep their pockets full of change
Anyway, I can't wait to tell him I've quit smoking and now just vaping (well, mainly, except for a couple drags from an analog maybe twice a day). He's going to faint! However, after reading this thread, I'm hoping that he doesn't discover high sugar or whatever it is, because my mom became diabetic in early 70's, but she had gained a lot of weight by then, and, was eating more low-fat low-cholesterol but more sugared products most likely. I'm pushing 60 soon and I've been lucky so far with only the thyroid problem. Not counting the passing of kidney stones now and then, but I digress...
I had heard that quitting smoking makes people gain weight. I have neither gained nor lost weight in the 3 months that I've been vaping. However, I do drink more water - which, I believe, is a good thing. I'm slightly underweight for my age group, according to statistics. A few years ago I made a conscious decision to eat less, but more frequently, small quantities but more often. Sorry, that was redundant.
I seem to be rambling more, now that I'm vaping instead of smoking.....I don't remember why I chimed in here....
Was my memory sharper when smoking analogs? Have I become ditzy? or ditzier I should say
I'll be curious to see if the blood tests show unusual results for anything! If so, do I blame it on vaping, not smoking or aging? hmmmm