TSH stands for Thyroid-Stimulating Hormone and is also known as thyrotropin. TSH is released by the pituitary gland to stimulate the enzyme thyroid peroxidase (TPO). TPO made in the thyroid gland and iodine combines with hydrogen peroxidase to make thyroid hormone.
Thyroxine, better known as T4, is one of the hormones produced by the thyroid gland. It is called T4 because it contains four iodine molecules attached to a protein called thyroglobulin. Approximately 93% of the hormone produced in the thyroid gland consists of T4.
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Triiodothyronineis, also called T3, makes up about 7% of the total hormone produced by the thyroid gland. Since this is the predominant thyroid hormone used by the body, it must be made from other sources.
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Range Healthy Thyroid Hormone
Laboratory range not the same as functional health ranges for blood sugar levels.
Figures for normal levels of thyroid hormones in the blood are categorized into two sets. One is the standard procedure, which is a laboratory range seen in the laboratory report. The second is the functional range.
For normal levels of thyroid hormones in the blood, the lab range is usually wide while the functional range is fixed. So, what's the difference?
Laboratory range for normal levels of sugar in the blood is obtained from various laboratories that collect a vast array of tests. These results are usually average to get the range, but that healthy people often do not have the laboratory which is a drawback of this process.