It's why I had them taken out. I have hashimoto's thyroiditis and other random autoimmune issues. I've had them gone for a few months and for the first time in years reduced my thyroid meds. I am going to get my labs done and if this doctor is cool I can get him to run the TPO test (otherwise I'll just order it myself but I figure I'll give this guy a chance to listen to me) and I can see if my thyroid antibodies are actually lower.