The pituitary response is abnormal. Stop TSH worship.

After oversimplifying T4 conversion as if it only converts into T3 (see Part 1 of this post), Canada's endocrinology association make the claim that: "Intracellular T3 levels regulate pituitary secretion and blood levels of TSH, as well as the effects of thyroid hormone in multiple organs." (1) This may be partially true, but it is … Continue reading The pituitary response is abnormal. Stop TSH worship.

No, T4 does not always convert to enough T3.

"T4 is converted into T3 at the cellular level in virtually all organs" This is what Canada's endocrinologists claim at the opening of their statement under their recommendation "Don’t use Free T4 or T3 to screen for hypothyroidism or to monitor and adjust levothyroxine (T4) dose in patients with known primary hypothyroidism." What does this … Continue reading No, T4 does not always convert to enough T3.