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Bitiron T3 and T4mix 100 tabs

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$70.00
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Dosage 50 mcg Levothyroxine (T4) and 12.5 mcg Liothyronine (T3)
Total amount 100 tabs/box
Component 50 mcg Levothyroxine (T4) and 12.5 mcg Liothyronine (T3)

Bitiron is a synthetically derived thyroid hormone replacement preparation. It consists of levothyroxine sodium (thyroxine, T4) and liothyronine sodium (triiodothyronine, T3) in a 4 to 1 ratio by weight. Liotrix was developed when it was believed that serum levels of both T4 and T3 were maintained by direct thyroidal secretion. It is now known that the thyroid gland secretes approximately ten times more T4 than T3 and that 80% of serum T3 is derived from deiodination of T4 in peripheral tissues. Administration of levothyroxine alone is sufficient for maintaining serum T4 and T3 levels in most patients and combination hormone replacement therapy generally offers no therapeutic advantage. In fact, administration of T3 may result in supratherapeutic levels of T3.

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