18 months ago I expect I had pretty severe insulin resistance. When I ate high carb (trying to be healthy) my energy levels swung wildly and I frequently was stressed and panic prone when I couldn’t get a quick fix from whole wheat bread, raisins, orange juice and other things on which I had increasing dependence. I suspect my blood glucose was spiking and crashing frequently though I didn’t really understand it at the time and didn’t monitor it until after going LCHF for a few months and the energy swings and hunger had abated. And then I saw the long spikes from things like mangoes, sweet potato and quinoa so I went keto.
Since stopping HCLF I’ve not experienced symptoms one might associate with low blood glucose despite my recent best efforts at hypoglycemia, though I’ve only done it when ketones are high. I don’t have a continuous glucose monitor so I don’t actually know what happens while I sleep and only get a reading if I wake up in the middle of the night to pee or when I get up in the morning. I have worn a heart rate variability monitor that logs to my phone while sleeping and it has not shown anything alarming.
A couple months ago a study was published on correlation between IR and the severity and rate of progression of my disease. Prior to the dietary changes my deterioration was brutal and now I’m recovering so I’m guessing my IR is much lower. My fasting blood glucose has been steadily dropping and I’ve been able to eat increasing amounts of low glycemic carbs without raising blood glucose significantly. I’ve an appointment to get some extensive blood work done next month which I hope will confirm it.
I can’t say with certainty, but my impression, at least for myself, is that using whey protein to break a fast doesn’t aggravate insulin resistance, probably because the insulin response is muted by hypoglycemia.