Why is it foolish to rigidly apply the FT3 lab reference range for people on T3-Only, and probably for those on T4/T3 and NDT too?
Almost all doctors think the FT3 reference range should always be abided by, i.e. an FT3 result should always be in range. Most patients agree with this approach too - as it is what they are often told.
Often the effect of doing this is that patient's T3 medication is never increased to a therapeutic dose, or it may even be reduced if FT3 is above the top of the range. So, why isn't this ok?