Guest guest Posted July 2, 2010 Report Share Posted July 2, 2010 There are many possible causes of RT3. Moderator Nick has an excellent web page about this, here's the link: http://www.thyroid-rt3.com/whatare1.htm > > I always took synthroid and now my body is rejecting it causing muscle and joint pains, weakness, fatigue, etc. Does anyone know why T4 to T3 conversion would stop? Not sure thats what I have but trying to figure it out. > Quote Link to comment Share on other sites More sharing options...
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