As always, an article generously littered with simple, distilled shots of good advice backed up by the biochemistry research placed in between.

The summary, "if we keep our carbohydrate intake under our body’s requirement while not in ketosis, which is perhaps 20% of total calories—and only eat those carbohydrates with meals involving complete protein and fat, not by themselves—most of us should be able to gain the fat-burning benefits of metabolic flexibility without suffering the pain of trying to adapt to ketosis" is most useful.

I have removed potatoes from my diet while fat loss is still a goal, as well as a healing my gut. I do include a good number of milder carbohydrates.

Understanding that when well portioned, these will help keep me in a normal state and enable my body to use the remaining excess fat stores more efficiently and then residual fat stores when necessary really is the foundation for my next step now that the initial surge of fat loss from activity is slowing down.

I don't routinely weigh or measure myself or my intake. I have weighed myself and know my weight has dropped, but I am not focussed on weight loss; it's fat loss for now and I fully appreciate that I might not lose as dramatically in terms of weight or size.

Superb article, J! Thanks!

Currently I am trying to go into ketosis. I went lc paleo and as long as I eat 50-200 gram carbs (veggies, fruits, nuts) a day everything is working wonderful.

But I wanted to fight overeating on carbs because they don't make me satiated (I am skinny, though), so decided to go into ketosis (high-fat)

For more than 4-5 weeks now I didn't eat more than 40 g carbs a day, in average less than 20, some days none at all. I feel like crap (That is, regarding my metabolism/circulatory), really weak.

More important, my cognitive abilities seem to be at it's lowest since going off the carbs, I have even problems putting sentences together. And I thought a ketogenic diet improves cognitive performance.

Normally the transition should long have been done, shouldn't it?

Is there anything to do to help this process or should I just go on eating 20-40% carbs again?

Thanks, J.!

My hope was to heal my migraines, which are highly associated with an energy crisis in the brain due to hypoglycemia/glucose intolerance with similarities to epilepsy.

1. Critchley M. Migraine Lancet 1933;1:123-6
2. Wilkinson CF Jr. Recurrent migrainoid headaches associated with spontaneous hypoglycemia. Am J Med Sci 1949;218:209–12.
3. Roberts HJ Migraine and Related Vascular Headaches Due to Diabetogenic Hyperinsulinism Headache 1967, July,41-62
4. Dexter JD, Roberts J, Byer JA. The five hour glucose tolerance test and effect of low sucrose diet in migraine. Headache 1978;18:91–4.

Roberts (1967)suggested , to change the name of migraine into "hypoglycemic headaches":

"The fundamental metabolic disturbance that usually triggers
such headaches is recurrent hypoglycemia ... [it is suggested that] the
term migraine be replaced by ... 'hypoglycemic headache.'"

So it is likely a ketogenic diet can heal the energy crisis in the brain:

Strahlman, R. Scott: Can Ketosis Help Migraine Sufferers? A Case
Report. Headache: The Journal of Head and Face Pain. Volume 46 Page 182 -
January 2006. doi:10.1111/j.1526-4610.2006.00321_5.x

Apparantly also depression can be improved with a ketogenic diet: Murphy P, Likhodii S, Nylen K, Burnham WM: The antidepressant properties
of the ketogenic diet. Biol Psychiatry. 2004;56: 981-983

I improved my migraine vastly due to the last weeks. To see long term improvements and never suffer from it again I calculated tat I need to stay in ketosis for at least a few months to let my body recover.

I read the articles. Seems it is harder to maintain a healthy ketotic state than I  thought previously. I suspect the cognitive impairment is due to the fact that not enough ketones are generated while gluconeogenesis is ineffective.