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Supplements | Thyroid Bioidentical Hormones |
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About Thyroids
Thyroid - triodothyronine (T3) and thyroxine (T4), are produced by the thyroid gland which is primarily responsible for the regulation of metabolism. Iodine is necessary for the production of T3 and T4. The major form of thyroid hormone in the blood is thyroxine (T4), which has a longer half-life than T3. T4 is converted to the active T3 (three to four times more potent than T4) within somatic cells by deiodinases (5'-iodinase). Both T3 and T4 are used to treat thyroid hormone deficiency (hypothyroidism). They are both absorbed well by the gut, so can be given orally. Levothyroxine is the pharmaceutical name of physiological thyroxine (T4), which is metabolized more slowly than T3 and hence usually only needs once-daily administration. Natural desiccated thyroid hormones are derived from pig thyroid glands, and are a "natural" hypothyroid treatment containing 20% T3 and traces of T2, T1 and calcitonin. Also available are synthetic combinations of T3/T4 in different ratios (such as liotrix) and pure-T3 medications (liothyronine). Levothyroxine is usually the first course of treatment tried by conventional medicine. However, levothyroxine contains only T4 and is therefore largely ineffective for patients unable to convert T4 to T3. That is why some patients feel that they do significantly better only on desiccated thyroid hormones. These patients may choose to take natural thyroid hormone as it contains a mixture of T4 and T3. Desiccated thyroid is also used successfully in treatment of certain fibromyalgia and chronic fatigue syndromes. Why Optimize Thyroid Levels with BHRT at Forever Ageless
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Symptoms of Thyroid Hormone Deficiency
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