I'm not a doctor or anything but my own interpretation of this affect is that you are depleting your glucose stores, and when you reach ketosis, you once again

I'm not a doctor or anything but my own interpretation of this affect is that you are depleting your glucose stores, and when you reach ketosis, you once again have energy to burn. https://en.wikipedia.org/wiki/Ketosis https://en.wikipedia.org/wiki/Ketosis