Hello. I`m reversed t2 fighter :)

[Winnie53]

Totally agree.
If the fuel intake (from protein and carbs) is less than the fuel used, then the body is going to breakdown fat (dietary or from fat storage) to make up the deficit. We also often dip into ketogenesis overnight if the gap between yesterday's food and today's food is long enough. Although this does work alongside glycogen stores in the liver and muscles so the conditions vary a lot.

Thank you both @Brunneria and @ringi This information validates my experiences these past two and a half years bouncing in and out of ketosis and up and down on the scale when weighing myself daily.