Hi- I’ve been working with my doctor and endo for 9 months now. About 2 years ago TSH stopped being produced. I’ve been on thyroid therapy for about 8 years - NDT for 6 of those eight - I was on NDT 120 mg when suddenly my FT4 dropped below range and my TSH went below range. The endo insisted I go on synthroid and then they kept lowering the dose but my TSH levels never came up. I’m going to insist that my dosage is raised as I’m hypo - weight gain swelling achiness feeling blah. Currently my labs show on 150 ug synthroid
TSH 0.08 (range 0.32-5.04 mU/L)
FT4 13.9 (range 10.6-19.7 pmol/L)
FT3 3.36 (range 3.00-5.90 pmol/L)
TPO antibodies 75 <35 ( considering 8 years ago I was > 1000 - the endo says this is because my thyroid gland was s almost completely destroyed- nothing to do with gluten free/sugar free/ dairy free)
My question is why does the TSH stop signaling? Obviously im not hyper.
Thankyou for your thoughts on why TSH stops being produced