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What is T2 T3 T4?
- Thread starter Doooon
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diamonddiceclay
New member
t3 is cytomel,t4 is synthroid
OK, we have an obvious lack of Thyroid knowledge here. I don't feel like reinventing the wheel, so I'm going to paste a well-written piece from a lady whose dealt with thyroid issues most of her life. This is not my work, but well-written. She is not an MD, but well-learned. For more info, I will post the site at the bottom. I hope this helps. If you have any specific questions, post'm, I'll do my best to answer. This piece addresses all the T's of the Thyroid (T4, T3, T2, etc.)
"The hypothalamus gland takes note of how much thyroid hormone there is in the bloodstream and if the amount is too low, it releases a hormone called TRH. This is Thyrotropin Releasing Hormone. It goes to the pituitary gland and stimulates it to release TSH. This is Thyroid Stimulating Hormone, and it goes to the thyroid gland to tell it to make some more thyroid hormone. So the thyroid gland takes in the amino acid tyrosine and the mineral iodine and then combines the two, creating the thyroid hormone. There is T0 and T1 (0.5%), T2 (4.5%), T3 (15%), and T4 (80%) (These percentages are approximate; I have found different numbers from different sources). Each of these hormones is stored in the thyroid gland and also released into the bloodstream. No one knows what T0 and T1 are for. T4 is very stable and courses through the bloodstream, ready to be taken up by a needy tissue for conversion to T3 and T2. What your gland does is to make a little bit of T2 and T3 and release them to the body for instant usage. Then your gland also produces a stockpile of T4 which it releases to travel around in your blood, ready for any needy cell to convert over into useable T3 (and T2). To convert T4 into T3 (and T3 into T2), your tissues use an enzyme, deiodinase, to knock one of the iodine molecules off. Well, some of your tissues require a supply of T2 in order to make this enzyme (while other tissues are able to make deiodinase without T2). Now, there are also several different deiodinase enzymes and they knock different iodines off. This means you will sometimes get reverse T3 instead of T3. And this is how your body creates the 3 different types of T2."
http://home.usaa.net/~wurmstein/#MEDS
-B
"The hypothalamus gland takes note of how much thyroid hormone there is in the bloodstream and if the amount is too low, it releases a hormone called TRH. This is Thyrotropin Releasing Hormone. It goes to the pituitary gland and stimulates it to release TSH. This is Thyroid Stimulating Hormone, and it goes to the thyroid gland to tell it to make some more thyroid hormone. So the thyroid gland takes in the amino acid tyrosine and the mineral iodine and then combines the two, creating the thyroid hormone. There is T0 and T1 (0.5%), T2 (4.5%), T3 (15%), and T4 (80%) (These percentages are approximate; I have found different numbers from different sources). Each of these hormones is stored in the thyroid gland and also released into the bloodstream. No one knows what T0 and T1 are for. T4 is very stable and courses through the bloodstream, ready to be taken up by a needy tissue for conversion to T3 and T2. What your gland does is to make a little bit of T2 and T3 and release them to the body for instant usage. Then your gland also produces a stockpile of T4 which it releases to travel around in your blood, ready for any needy cell to convert over into useable T3 (and T2). To convert T4 into T3 (and T3 into T2), your tissues use an enzyme, deiodinase, to knock one of the iodine molecules off. Well, some of your tissues require a supply of T2 in order to make this enzyme (while other tissues are able to make deiodinase without T2). Now, there are also several different deiodinase enzymes and they knock different iodines off. This means you will sometimes get reverse T3 instead of T3. And this is how your body creates the 3 different types of T2."
http://home.usaa.net/~wurmstein/#MEDS
-B
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