First, depends on your glucose and glycogen stores when you start deep ketosis diet.
Your liver and muscles store glycogen as well as some other tissues.
Then how must exercise you do – exercise will burn the glycogen in the muscles primarily at first.
Of course it also matters how strict you are, and how efficient your body is at mobilizing fat, so even your fat content, especially in your liver and pancreas.
A big goal for most people will be to clear the fatty liver and fatty pancreas.
Then according to Dr. Boz’s book (and other sources) your tissues will switch over to using fatty acids and burning ketones at different rates. Some will switch early and more completely while others will take months to switch to primarily or even heavily.
As more and more of your tissues switch to burning fat for fuel the excess in the blood, and particularly the spilling into urine (as measured by ketosticks) will likely drop down.
I am fairly new to this part of keto diets (autophagy and measuring blood ketones) so I could be wrong about some of the above.
As of today, end of 5th full fasting day (12 days end of last month):
GKI 1.03 DrBozRatio 19 (BG 78 mg/dL, Ketones 4.2 mmol/L)
This puts me right at the edge of “Deep Autophagy” (and below “Deep Ketos, therapeutic autophagy”) from this table:
0-1 very deep autophagy
1-3 deep ketosis - therapeutic autophagy
3-6 moderate keto - functional weight loss
6-9 low keto - weight maintenance
9-12 (or higher) - no ketosis, highly anabolic (fat or muscle depends on demand)
For others, my main issue on the previous 12-day fast was keeping my electrolytes balanced. Watch out for that.
Thanks to everyone above for your help and comments, especially Karim_Wassef