Here is an inspirational TEDx talk by Dr. Terry Wahls (@TerryWahls) on how she used pubmed.gov to research and develop a hunter gatherer diet rich in phytonutrients that cured her multiple sclerosis - an autoimmune disease of the central nervous system. Note that her approach focussed on the beneficial vitamins and phytonutrients from these foods. She did not mention the changes in the gut bacteria that are also occurring on this diet and that can have positive repercussions on the body's metabolites. I hope her message helps others.
Diet changes the gut microbiome, which in turn changes the metabolic, neuronal, and inflammatory networks that may cause or cure many chronic 'Western' diseases. Nothing short of awesome. The regenerative power of the gut microbiome is akin to stem cells and here to stay.