I found this TED talk where a woman claims MS had made her bedridden but by following the diet of our ancestors she reversed her symptoms and now she is able to walk again. According to her, the food she eats now fuels the mitochondria:
https://www.youtube.com/watch?v=KLjgBLwH3Wc
No idea whether this is true or not. But as I stated in another thread there is something really wrong with our food. All these neurological diseases and cancers ... I have the feeling they could be prevented eating a good diet of non-contaminated foods.