Question to mods about low dose Armour thyroid and reduction in rT3 ratio

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Dear Val Nick and other mods,

A month ago, after an unsuccessful 3 weeks of levoxyl, my labs (Quest) were :

TSH 5.75 (normal range 0.4 - 4.50)

fT4 0.9 (normal range 0.8-1.8)

fT3 299 (normal range 230 - 420)

rT3 20 (normal range 11 - 32)

ratio fT3/rT3 = 15

On the ZRT saliva test, I was elevated on cortisol on the morning and evening samples (1 and 3).

My doctor has decided that I should start Armour Thyroid 15 mg and every 2 weeks increase by 15 mg, and after 6 weeks at 90 mg Armour thyroid, get new labs.

I've read here that with a low ratio (<20), the T3 gets converted to rT3 but my doctor doesn't think this is an issue? Has anyone had any experience with treating this low a ratio with low dose Armour and increasing dosage in 2 week increments and seen good results? Please advise.

Stan