With or without food seems to make no difference, similarly exercise doesn't seem to make a difference either . I take blood pressure tablets but no change there, nothing over the counter and no herbs, This morning it started to gradually rise from around 5.5 to 9.5 and has stayed at that four about four hours with no food at all other than two glasses of water with apple cyder This is the third day of this phenomena ,one with a breakfast around 9 am and the second with both breakfast at 9 and lunch at 1 , the, third , today, nothing but the apple cyder vinegar .
What has happened is that I am not in ketosis for the first time since this began I was already mildly ketotic from the previous diet through lack of calories before I made the switch.
its interesting that I had reached a weight plateau shortly before this happened spending a week at the same weight, having read up on that, I figured it might not hurt to eat a little more anyway, though I did stick to low carb.
There must have been more hidden carbs or too much protein in the meals out I have eaten over the last few days or so ( fish dishes) that has tipped the balance to no ketones. ( though I have lost a bit of weight ! so all it's a bit odd )
My ketone reading is still zero after an 18 hour fast with just the vinegar. Though interestingly I am not particularly hungry. I am going to see if I can hold out with no food other than a couple of stock cubes until I get back to a ketone level of at least 0.5 - which I was happily maintaining before and see if that then brings down this particular phenomenon. It may be that my body simply needs to operate in ketosis mode if I am to keep control of the blood sugars.
Finally I think the Freestyle might be a touch on the high side by about 0.5 which would reduce most of my numbers into the mid 8's not 9's which would feel a lot less bad.