Hi,
@MartinK. The time it takes to become keto-adapted is individual. The older one is, the more ill one is, the longer it takes. And some, such as Dr. Wolfgang Lutz, and Dr. Jan Kwasniewski, felt that dropping carbs too fast, was an unnecessary stress.
Here is a
post at Dr. Michael Eades' blog which might be of help. It is common to eat more meat and fat when one starts a very low carb diet, if that is of any help.
If you made a great change to go on a very low carb diet, the adjustment could be dramatic. If one has been eating 200g/CHO per day, to drop to 20-40g/d is a shock to one's system. Dr. Lutz had people who were older or ill start at 90-100g/CHO/d, and stay there until they had adjusted. Some need weeks, some months, some never get adjusted. The adjustment is metabolic. If 90-100g/CHO per day is easy, then lower to 60-70g. That was Dr. Lutz's approach. He details this in his book, Life Without Bread.
In my opinion, unless there is a great need to be ketogenic, such as seizures, Parkinson's, migraines, etc., why not increase the carbs a bit, and find a protein level that makes you feel good.
The goal is to feel better, not to adhere to an external standard (unless that standard is a life-saving measure).
I have never measured ketones. I don't worry about them. My diet is structured so as to facilitate usage of FFAs.
Dr. Ron Rosedale has several very interesting talks at youtube on the purpose of a low carb diet, why FFAs are important, etc. He has his own website, too.
If staying at ketogenic levels of protein and carbs makes one feel crummy, why not increase them a bit?
If I feel stressed from staying at 50g/PRO and 25-30g/CHO, I just increase protein to 60 or 70g/PRO and carbs up to 45, or even 60gCHO/d. I adjust the amounts and contents to try to have the steadiest brain function, and energy levels, without increasing brain agitation or amine/salicylate/glutamate load. I used to count, weigh and measure everything, and sometimes do, now, to check.
Food planning is a bit of a puzzle and it takes experimenting for oneself to find what fits well.
If you don't mind posting them, could you post about your PEM busters? Thanks.
Best wishes to you.