Yup. Just had my dose of "keto euphoria" about a 2 months into keto adaptation. Probably took me so long because I didn't drop my carbs as low as most (kept them between 40-50 gm/day.)
I started a lchf /primal diet about 9 days ago. About two days in I started to feel a buzz that was remarkably like neurontin and ghb . When I began reading about ketones and saw beta hydroxybutyrate I began to think it must be responsible for the buzz.
It's a crazy feeling. Calmness but also I blank out . Drastically reduced anxiety. All I can say is that my mind feels quiet in a way it never has. But I do kind of blank out .
I'm fairly convinced that at least some of us have brains that are expecting this natural gaba affecting ketone as a regular part of it's natural functioning but due to a world drenched in carbohydrates, we override the programing. Carbohydrate rich worlds are also alcohol rich worlds. I suspect that eliminating beta hydroxybutyrate through carbohydrate consumption leaves some of us extra sensitive to alcoholism. I'm lucky enough to have made it through my own alcoholism.
Insofar as ketosis could increase calmness and mental clarity it would make one wonder about the practise of prolonged fasting common to many religions, wouldn't it? Fasting seems usually to be understood in terms of self-denial, but it would certainly be one way of getting you into ketosis, if a rather drastic one …
Emaciated Buddha images:
Buddha Statue and Asian antiques at the Asiatic Bazaar: THE EMACIATED GANDHARAN BUDDHA IMAGES
IIRC, its's been seriously suggested that the "odour of sanctity" may have been ketones.
Since I suspect our distant ancestors regularly went into ketosis, it is probably an effect aimed at reducing anxiety due to lack of readily available foods so you can go on hunting with an empty stomach, relying on body fat for thinking and moving. Just a guess though ...
Facinating topic. definitely worth further research and self experimentation. I am trying to put on some weight at the moment but really enjoy going without food for the serenity and extra time in the day.
Man seeks to change the foods available in nature to suit his tastes, thereby putting an end to the very essence of life contained in them.