To anybody it may concern...
I'm a diabetic also (type 2). I chain drip vape. I use a Smoking Everywhere gold PV and a ePuffer super mini. The E-liquids I'm using right now are from ePuffer. Vanilla and Menthol, both are High dose. I've been vaping since July 1, 2008. So far, so good, vaping does not affect my sugar levels.
As far as I understand, PG does not raise blood sugar levels at any significant amount, especially not by vaping it. You would have to ingest it in large amounts for that to happen. Remember, PG is in food additives, drugs, cosmetics, and antibacterial sanitizers (just to name a few).
Have you ever stood in a room with a fog machine producing very thick smoke? Some of them use PG as the fog solution. Where do you think the E-cig idea came from? An e-cig is a minature fog machine.
There might be some e-liquids out there using sweeteners in the delicious flavors, chocolate, cherry, banana, apple, and the like. And, if you get it on your lips and tongue, then of course it's going to affect blood sugar because you are directly consuming it. But it still shouldn't be causing a drastic change... unless you're drinking the frickin' stuff, or maybe your insulin levels are super whacked.
Also, right after you quit smoking analogs and the carbon monoxide associated with it, your body goes through a chemical rebalancing stage. And I might add that's when I was diagnosed with diabetes with blood sugar levels nearing 300, and I wasn't vaping then. - By the way, it's the carbon monoxide in analogs which cause blood sugar levels to rise. Smoking plus diabetes will kill you for sure... no lie. - Vaping on the other hand is inhaling mostly water vapor. What's in water? Oxygen of course. How do you separate it? By using an electrical current, or by heating it up and allowing it to vaporize into a gas. - Come on Mr. FDA, this is a no brainer. E-cigs are a better alternative! Them and their stupid scare tactics... hummph... I feel like slapping those jerks around a few times myself.
So anyway, something else is causing your blood sugar levels to get jacked. Have you switched to Splenda? It has sugar alcohol in it, which is not good for some diabetics. Large amounts of it in tea is not a good idea... just a FYI there.
Another thing to consider is your diabetic advancement may have occurred during the same time of vaping as a coincidence. It's something we diabetics have to live with. You can slow it's progression, and in some cases bring it to a halt, but you still can't cure it.
Also, I don't know a diabetic yet that doesn't cheat on their diet every once in a while. And some diabetics are STILL eating things they shouldn't, but they do it because they don't know it's hurting them, or they think the meds can "protect" them, which is bull. The diet change (and exercise) is part of the treatment combined with the meds. I can't seem to get my mother to understand that one either. I have to be nearly a vegetarian to control my diabetes, and something with less than 1 g of sugar in it will jack up my level 20 mg/dL in 1.5 hours. So here again, I know vaping doesn't have an affect with that much sensitivity.
Suggestions...
Rethink your diet. Go take diabetes classes. Hospitals and medical arts centers usually have a diabetes counselor who offer free courses in better diabetic control and monitoring. Even if you think you already know your diabetic condition, take the classes anyway. At least learn about the Diabetic Food Pyramid which has 6 food groups.
Exercise, exercise, exercise.... Oh, did I mention Exercise? I hate that word too, but something as simple as a 20 minute fast walk every day can stimulate the natural healing power of the body a great deal.
Also, learn how to vape correctly. If you get the juice directly into your mouth, then you're doing it wrong. Slow and long drags are the key, and don't tilt the device where you have to suck down, always suck upwards... but those are the basics and every vaper should know that by now.
One other note... If you have quit BOTH vaping and cigarettes, or any other tobacco product, then that's awesome. More power to ya! The healthier, the better. To be perfectly honest, nobody should be using nicotine in any form, especially diabetics, heart patients, and people with other cardiovascular disorders. But, if you're severely nicotine dependent and choose to continue using nicotine, then I would have to say that e-cigs are the best route to take.
Anywho... that's just my 2 cents worth... Have a nice day.