[tth3uoku]

Why is it terrible? What evidence is there that your brain _hates_ it?

From what I understand, there is evidence that the brain may function better deriving energy from ketones, and ketosis may be neuroprotective: https://blogs.scientificamerican.com/mind-guest-blog/the-fat...

[aalleavitch]

Well your brain only does it when you’re starved for glucose, for one. If your brain operated better off of ketones it’s hard to imagine why it would preferentially operate off of glucose when it’s available.

But also, have you done it? It feels awful.