I have not tried combining meat with a reasonable amount of fat yet. I experience irritation if I do mono-eating, some foods higher some foods lower. Most raw meat is minimally irritating but does not satisfy hunger. Some of the worst foods include fruit, which I usually find a need to consume with starch to protect my stomach. Otherwise I some get some pain, increased hunger, and indigestion symptoms. Plain fruits such as cucumber especially do this and intensify hunger. I remember a time when my typical meal consisted of a starch, meat, and fruit as that seemed to reduce symptoms.
To put a long story short, my stomach needs to be shielded by food such as starch when eating other foods, or risk effects such as increased hunger, indigestion, and irritation.
these seem like typical symptoms of how you are eating regularly and transition rather than anything to do with nerve damage. of course if you mix starch with a cucumber you will feel more full, cucumbers with peel are also usually hell on the stomach. Most people won't be satisfied eating pure protein or eat that way unless they are eating a variety of fats or carbs throughout the day. Think about the way most westerners eat, just because something masks symptoms doesn't mean its working to correct the problem. You think a cross-country trucker stops for a couple of peaches and doesn't get digestive problems?
fruits can be irritating for a variety of reasons and benefit can be had by combining with some animal, most fruit fats, and most dairy fats, and certain kinds with some types of nuts/seeds. With starches the fruit will automatically ferment, fruit needs to pass through to the lower intestine, that is what that wierd feeling usually is. Also fruit creates some kind of cleansing reaction which is not always helpful or comfortable. Its common to get back aches and all kinds of intestinal things from high sugar seedless fruits. similar to above, is if someone on RAF is eating a fruit meal, they're not going to be satisfied unless they eat enough fat and a fair amount of animal food regularly, or if they are eating massive meals of fruits or combining with fats.
I still don't understand how you've made this conclusion (was there a diagnosis?) especially if you havn't tried mixing meat with fats which is pretty much THE go-to meal. Some fats are difficult to source locally, but at the low end there is always eggs (the free range varieties are acceptable) or avocados at the bottom which are available everywhere. There are some people here that mentioned eating starch (roots -not grains) helped them in a variety of ways (more palatable, eating more etc...) but this shielding concept makes little sense either scientifically or alt-scientifically especially if you arn't even entertaining basic solutions. One major problem with what you doing is increased risk of bacteria. Since you mention in the other thread going to the hospital or whatever from ingesting grains (which doesn't happen to your average rice eater), you can see why I'm pushing you to question your program here.