Guest guest Posted April 13, 2006 Report Share Posted April 13, 2006 Can someone tell me if there is difference between these two things: free t3 and free t3 index? On my son's blood test, it says Free T4 and Free T3 Index, but nothing that says only Free t3. Sorry if this is a stupid question. Anita Quote Link to comment Share on other sites More sharing options...
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