Jodi Knapp’s The Hypothyroidism Solution PDF book download. Primary hypothyroidism basically boils down to a thyroid gland that isn’t doing its job of manufacturing thyroid hormone. If thyroid hormone isn’t being made, it can’t carry out its function in the body. Thyroid hormones come in two basic forms, T3 (triiodothyronine) and T4 (tetraiodothyronine). Both of these hormones basically consist of an amino acid molecule (tyrosine) attached to three (T3) or four (T4) molecules of iodine.
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