Stumbled across this article about hypothyroidism treatment paradigm shift:
verywell.com/major-changes-...
This article says something about TSH I had read on a pharmacist.com article some years back. Although the low end of the TSH scale defined by "official" groups is 0.3-0.5, a Scottish study determined that there is no risk of arrhythmia or reduced bone density, so long as 0.04<TSH<0.4. So given what functional medicine has said about TSH upper limit, it appears the "normal" range should be something like 0.1<TSH<2.0. The article implies (but does not explicitly state) that TSH should not be used for diagnosis.
The Normal TSH Reference Range: What Has Changed in the Last Decade?
Is the TSH normal range even representative?
Taking 60 mcg daily of T3 medication, have low TSH and low T4, FT3 is within normal range. 
TSH low the rest normal
