I have been undergoing a metabolic reset to begin the year. I have been low carb/keto on and off for the last 4.5 years and hop in and out of ketosis for short periods of time when it benefits me or when my body is telling me I need to. Right now, I decided to spend the first 6 weeks of 2018 in ketosis. I check my numbers every morning and have consistently been between 1.2 and 2.2 mmol/L. I contracted a virus two days ago (it was not influenza but I caught something) and my ketone levels shot through the roof. Yesterday morning I was at 5.2 (first morning of being sick) and this morning I was at 5.8 (although now I am in a fasted state as I have decided to fast through this virus.) I tried to google and look up being sick while in ketosis but everything led to topics about diabetes or the Ketone Flu - neither of which I have.
Is it common for your ketone levels to shoot up like this while you are ill? My GKI index is well under 1 at this point.