Doctor insights on:
Thyroxine Vs Triiodothyronine
Can any doc tell me what's the difference between thyroxine, thyrocalcitonin and triiodothyronine?
Yes: Thyroxine also known as T4 is the main product of the thyroid gland. Triiodothyronine or t3 (liothyronine) is also a product of the thyroid but most of it comes from the conversion of T4 in the human tissues by the enzyme deiodinase. T3 (liothyronine) is the active and most potent form of thyroid hormone. Thyrocalcitonin or just calcitonin is unrelated to the above two, comes from the c-cells, and affects the calcium level. ...Read more
Triiodothyronine : 0.76 ng/ml; thyroxine : 5.27 ; thyroid stimulating hormone : 1.15. Is this normal?
Probably: In interpreting thyroid hormone levels, you have to consider several things: What is the clinical situation at the time of the lab draw- as stress, medications, even pregnancy can all effect the levels and what they should be. Every lab also has a slightly different 'normal' range depending on how they measure the hormone. Seeing the trend also helps - Are they stable, going up or down? ...Read moreSee 1 more doctor answer
Does normal (1.01) "thyroxine (t4) free, direct, s, " normal (0.931) "tsh, " and low (67) "triiodothyronine (t3)" = Synthroid dose good? Or go up/down?
Tsh=2.11/t3 uptake=30.3/free t3=3.3/thyroxine=9.2/triiodothyronine=102.4/ everything is normal. Why do I still feel extremely tired and irritable?
On syn. 50 mcg labs are: TSH 4.45; rt3 23.3; T4 10.4; t3uptake 30; free T3 3.1; triiodothyronine T3 121. Increase synthroid (thyroxine)? Don't sleep, fast heart.
Hypothyroidism: When thyroid hormone is low people symptoms are highly variable from person to person. Some people do not have symptoms from mildly low thyroid hormone. Symptoms depend on degree of deficit and amount of time the hormone has been low. Here are some symptoms that are possible; fatigue, constipation, weight gain, cold intolerance and dry skin. ...Read more
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