I know my type 2 diabetes is sort of under control, but bs will vary day to day, even when I try to eat something very similar ( I don't like eating the something again). Taking metformin er twice a day past 15 years.
A year ago for some reason my BS went out of control, I found out when DR checked bs up from 7.1 to over 10 in 6 months. As far as I know I did nothing different, now I take one shot a day plus metformin last check was 6.3.
One example, a banana one morning will have very little effect, next day same routine and boom 192 to 203.