Some primal foods may not be great for people with autoimmune diseases. I use a low lectin version of primal to keep my RA under control (I am not in remission, but I went from having severe completely disabling disease to being fully functional).
For me that means no nightshades, eggs, nuts, or dairy. Nightshades are the biggest one for my joints - tomatoes, potatoes, peppers, paprika (hidden in everything), tomatillos, eggplant.
I did 60 days with none of the high lectin groups and found my inflammation dropped way, way down. There are a couple of autoimmune threads around here.
I'm not sure I put much stock in the detox stuff. I did see a alternative health practitioner for some time who had really helped a friend of mine with RA. They did a lot of the heavy metal detox stuff - none of it helped me at all. Cost me a fortune though.