OK, Back in my SAD days, big, ol' fat me was pre-diabetic. I went whole hog PB. low carb, and lost a ton of weight. My FBG on SAD was 120. On LC PB, it got down to about 90 within a few months, but crept up to 110 over two years.
Doing some self-experimentation with potatoes and a blood glucose monitor, I found my FBG would be highest very early in the morning, then slowly lower itself until I ate at 1130am.
So at 6am, it would be 110, 1130am 90. I'd eat a LC lunch and my BG would be around 130 right after eating, lowering to 90 within an hour.
Eating 1 pound of white potato on an empty stomach would result in a BG spike up to 180, then back down to 90 within 2-3 hours, sometimes I'd even hit hypoglycemic territory in the 60's before stabilizing in 90's. That was while eating LC normally.
So, since Jan 1st, I have been eating approx 1 pound of starch a day (potatoes, sweet potatoes, plantains, and/or rice).
I hadn't checked my FBG for a while, but after 4 weeks of adding starch, I checked. FBG was 120!
Specifically, 6am - 120; 8am - 110, 10am - 105, 12am - 100.
I ate a lunch consisting of 1/2 pound of potato, sour cream, 1/2 pound of salmon, and some green veggies: BG spiked to 160, then dropped over 2 hours to 100 and was 95 at 3 hours.
Here's my take on all this:
I was insulin resistant to start from my SAD days, LC helped me to lose weight, but never addressed the underlying issue of insulin resistance. I'm hoping this will self-correct as an FBG of 120 is way too high.
What's your take?