I described myself earlier. Five years ago, after 3 years of progressive loss of feeling in my feet and legs, but NORMAL fasting glucose levels, my Dr found that my A1c was nearly 8. He handed me a copy of a diabetic diet, and a prescription for a meter. I was supposed to just measure glucose twice a day to establish a baseline. The following evening I had the featured dish at a chinese restaurant - sweet & sour something, over a heaping mound of rice - and a glucose reading of 244 two hours after the meeting!
So I did some research, and decided that the diabetic diet was filled with carbohydrates - and I would be better served with a low-glycemic diet - and it has CONTROLLED my glucose for 5 years, with NO medications for diabetes. My A1c is normal, and my glucose (2-4 hours after eating) is normal as well. But the neuropathy (confirmed by nerve conduction tests - persists, although it has stopped getting worse.
According to some, I am not diabetic like my mother was, but I know that sugar, (including orange juice or soft drinks,) rice, or potatoes in any quantity will send my glucose above 200 again, and pasta or bread are almost as bad. I suppose that would be the hundred-point swing you describe - but I don’t do those things any more.
The problem is I used to get 200+ swings ABOVE 110.
Helps you sleep Fur Shur.
My A1C, however, is in the "normal range".
More recently the researchers have been suggesting the swings "ain't no thang" when it comes to heart condition and we may be better off not worrying about them.
Benfotiamine, a form of B1 works well for neuropathy, and is quite safe.