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A member asked:
I have hashimotos & i'm on 180mg whole thyroid. my weight can fluctuate 1-2 kgs in 2days. my bloods show normal tsh, low t3 (liothyronine). any ideas?
3 doctors weighed in across 2 answers
TBG deficiency: Lots of people have low total T4 and T3 (liothyronine) because of thyroid binding globulin deficiency. It's not pathological. More accurate thyroid hormone measurements are achieved by measuring free thyroid hormone levels (ft4, ft3). The american thyroid association's position statement is that measuring ft3/t3 doesn't demonstrate thyroid hormone sufficiency. Supplementing with T3 (liothyronine) is not standard of care.
Answered 1/15/2015
5.3k views
Whole thyroid: Dessicated thyroid hormone has variable amount of T4 and t3 (liothyronine). While T4 has a long half life and maintains even levels in general, T3 (liothyronine) has a short half life and can waver throughout the day, especially if given once a day.
Answered 1/15/2015
5.3k views
Related Questions
A member asked:
23 yrs old f; thyroid peroxidase 13 (norm); thyroglobulin, antibody 3.0 (high); TSH 10.850 (high); nomal T3 (liothyronine) & t4. Hashimotos? Possible thyroid cancer
A doctor has provided 1 answer
A member asked:
I suffer from Hashimoto. My last two thyroid test months apart, TSH and T3 are normal but my T4 is high. Increase palpitations. What could cause normal TSH and T3 but high T4?
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A member asked:
Low t4, low t3, normal tsh (2.5) diffusely heterogeneous echo texture of the thyroid. Thyroid is enlarged. Family history of hashimotos. Doctor wants to do more labs in 3 months but is not an endocrinologist, should I be seen by an endocrinologist?
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A member asked:
TSH high (15) free T4 high (4.2) but free T3 low (2.1). 41 yrs old, has partial thyroid removal at 14. Hashimoto. Been on 300 mg of generic synthroid for 20 years. What does this mean?
A doctor has provided 1 answer
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