Thyroxine

What is Thyroxine?

The thyroid hormones, triiodothyronine (T3) and its prohormone, thyroxine (T4), are tyrosine-based hormones produced by the thyroid gland that are primarily responsible for regulation of metabolism. Iodine is necessary for the production of T3 and T4. A deficiency of iodine leads to decreased production of T3 and T4, enlarges the thyroid tissue and will cause the disease known as simple goitre. The major form of thyroid hormone in the blood is thyroxine (T4), which has a longer half-life than T3. In humans, the ratio of T4 to T3 released into the blood is roughly 20 to 1. T4 is converted to the active T3 (three to four times more potent than T4) within cells by deiodinases (5'-iodinase). These are further processed by decarboxylation and deiodination to produce iodothyronamine (T1a) and thyronamine (T0a). All three isoforms of the deiodinases are selenium-containing enzymes, thus dietary selenium is essential for T3 production.

Questions and answers on "Thyroxine"

MY TSH READING RIGHT NOW IS 8.02 AND MY ANTI TPO ANTIBODY IS 5.62IU/ML . MY LDL IS 137. I AM TAKING 25 THYROXINE TABLET IN THE MORNING. PREVIOUSLY...

doctor1 MD

dear patient

most likely you have chronic thyroid insufficiency meaning that your body cant produce enough thyroid hormones for your body needs;...

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Hi... am looking for Gynecologist ... I am 26 yrs married women.. I have irregularity in my periods... and am trying to conceive... went to consult...

doctor1 MD

Hi there.

Thanks for the query.

Since your TSH level was above 3, it means you had Hypothyroidism. For this you would have been prescribed...

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Hello Doctor. Months ago I was diagnosed with hypothyroidism and polycystic ovaries. My Gynecologist prescribed Thyroxin tablets for hypothyroidism...

doctor1 MD

Hi,
PCOS women require more efforts to loose weight & they can gain weight easily. You are on right track. Just continue your efforts to loose...

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