[mikorym]

Given that the brain's main source of energy is sugar and the heart's main source of energy is fat, and the complexity of the body's organs, I think any type of diet that limits specific types of energy sources should carry disclaimers.

For example, if you are on a keto diet and your diet is well-defined, what are the risks? Fatigue is one thing, but organ damage or otherwise dangerous effects should be discussed frankly and clearly.

I have not really found resources that don't have inherent conflicts of interest.

People who study to become dieticians have a much more straightforward and high level approach, e.g.: "You have a iron deficiency and don't get in enough protein, and I would advise eating more red meat."

[glogla]

Brain uses both. There's an interesting talk [1] about how brain's ability to use glucose lowers before Alzhaimers disease and others. There seems to be some link between brain diseases and glucose metabolism.

[1]: https://www.youtube.com/watch?v=XxGiQ7YrUYE