I suppose this is the crux of my argument. I think it would be great to investigate whether ketogenic diets work for all animals or just in humans. If they work well for all animals, then the diet is simply a fluke and has some alternate explanation other than being our natural diet.
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Also, having a diet that is 90%+ fat in nature might have been possible if we truly were scavengers for much of our existence subsisting on bone marrow and brains, which supply little protein. This is based on the fact that we might have been too small to hunt large game until only the last few hundred thousand years. If anything, scavenging points to a lower protein diet, whether the energy was provided by fats or carbs.
But a more natural diet might cure alot of things (perhaps not so unilaterally and successfully as mentioned) and it will be hard to target if healing even an otherwise incurable illness guarantees the best approach in absence of illness. In other words, it doesn't necessarily have the most healing power in total, just because certain chemicals or nutrients in that proportion function well for that purpose which is largely seen as an unnatural occurrence and imbalance. It certainly could mean that (it is most natural), but then you'd have to study the same ketogenic patients with other chronic illness to see if those are also overcome. Obviously the cooked nature and quality is already resulting in some physical breakdown, so it isn't the purity of the organism per se that is resulting in the best healing of that particular area. Also its worth investigating how soon after dropping the diet that symptoms would return, in the case of natural healing/hygiene (which I think is mostly bullshit but on this has some pertinence) a cure is only completely viable if it ceases to exist in absence of treatment, so even through the treatment is food, put on fasts or raw foods there would have to be no spikes in symptoms for it to be declared curative. Its possible even switching over to high ketogenic raw would be unbalancing for some epileptics. And the other factor people with the largest straying from a ketogenic diet would not necessarily be at highest risk for epilepsy.
Another reason it can't be confirmed as natural diet due entirely to its relief in one condition, is that people often experience relief just from removing processed foods or eating macrobiotics, prayer, all kinds of things. I think the common (speculation) about RZC is pertinent, perhaps because of the foods typically used on a ketogenic diet, that higher amounts of heated proteins can be aggravating to the healing that larger ammounts of raw proteins would not, or what I was trying to say before which is that they only are damaging for a certain type of healing but not definitively damaging for everyday ingestion. Certainly people that view RZC in the highest light would see it as healing most illnesses due to it being a natural diet (and not based entirely on its fat or protein ratios), but even if one would have an easier go proving RZC is a natural diet (one that encompasses a few ranges of macronutrients) its not going to guarantee the most healthful outcome in conquering all contemporary conditions, and the type of diet manufactured today might not be at all similar to an all animal foods diet in the past.
basically (and this does not defy the mice comparison) it may be possible that our diet is one that is extremely high in fat by 'design' (more so than other animals) but that are need for different ratios (higher or lower) is only culled upon by the onset of diseases due to previous inheritance and poor diet.
I think it is theoretically possible to get 90% fat in nature, and do believe in the scavenger model, but even then it would probably have to be an almost driven approach to specifically seek out such fat and biologically neglect other proteins. After all brains are what <70% fat? that would be alot of bones to reach a high activity level of primative man. Personally I think also the scavenger model for humans would include some plant matter/grubs and other proteins etc...But I do think its possible that certain ranges of nutrients can be most beneficial regardless if our ancestors needed them to thrive daily, especially with contemporary healing processes.