Hypothyroidism is a thyroid hormone insufficiency, so it's only logical to measure the success of therapy by the goal: T4 and T3 thyroid hormone sufficiency. Especially T3 sufficiency, the active hormone. Lab tests like Free T3 and Free T4 can indicate "relative" T3 and T4 sufficiency in bloodstream ... but one has to carefully interpret … Continue reading Interpreting Free T3 and Free T4 in therapy
For two related reasons: Because it is mistakenly believed that oral doses of thyroid hormone can sufficiently replace the natural secretion of living thyroid gland tissue. It is mistakenly believed that adjusting TSH secretion within the statistical "normal" range will create and/or signify thyroid hormone health in an individual treated thyroid patient. The problem is... … Continue reading Why has TSH testing replaced thyroid hormone testing?