A woman without MD recently did an herbal cleanse of all of her major organs, then went on a 40 fast, eating nothing but 8 oranges and 20 almonds a day, plus drinking distilled water. Although doing such a fast sounds risky, she reports in the first post below that all of her symptoms were gone post-fast. She also reports in the second post that she had ten times the muscle strength she had before.
I have no way of knowing whether such a fast would have positive or negative effects on a person with a progressive neuromuscular disease. The only way to find out would be to do it myself. Right now I'm having some cautions, and plan to do some other things for now. But I do want to report this lady's success for future reference.