I have the full diagnosis of MCTD, yet the basics are the same for all of the overlapping conditions. I adapt diet )non processed, low sugar and avoid inflammatory foods) and lifestyle (movement like walking, PT) and it works well with the meds. 25 years with this, and spending time on finding the full reasons is a rabbit hole. I do know that I have this as my mom had rickets as a child, RA in adulthood. It is enough, for me. I have specialists who mind the various symptoms. I do a fair amount of planning to deal with health and readily say no to anything that is too much. I don't try to convince anyone of anything anymore.