Diet changes.

I can not answer your questions but the fiber in vegetables is just as important as the nutrients plants provide. Juicing gives the nutrients (and toxins) from plants but not the fiber. If you want to repair your gut, eating the fiber is the way to do it. I've seen Vegans who ate a very poor diet. Raw plants with a variety of colors is the best way to rebuild a GI tract.

Make sure you eat enough carnitine as it can be secondary to ketosis and cause an increase in psychosis.