I'm having considerable GI problems and have for years. I am aware that the majority of Serotonin is made in the gut. I am also aware the GMO foods can affect the lining of the gut which is even worse for CFS/ME people. So with the bloating, constipation, pain and general muscle aches, sleep deprivation and frequent illnesses I have decided that I will try one of these diets. Paleo, GAPS, or Wahl's. Can anyone tell me of their experiences with any of these diets. I was on a strict macrobiotic healing diet for two years back in the early 1990's. I did not feel any better but lost a lot of weight. The macro diet relies heavily on grains, particularly brown rice, quinoa, etc. So I'm thinking that even though I was eating a lot of the good fermented miso, that the grains might have been a problem for me. I am living in anticipation of my healing.