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Thyroid Profile (T7/TSH)
What's Included?

Includes: T3 Uptake, T4 Total, Free T4 Index, TSH

This profile calculates the amount of T4 and TSH hormone in the blood and is part of an overall evaluation of thyroid function.

T4 is the major hormone controlling metabolism. The exact mechanisms are not completely known, but it is known that T4 increases the concentrations of numerous enzymes involved in the production of energy in the body. Thyroid function is complex and depends on the action of many different hormones.

Some hormones, such as T3, are active hormones and directly affect the way the body functions. Most of the T4 in the blood is bound to proteins. This provides a reservoir of available thyroxine.

TSH is a measurement of the amount of the hormone TSH in the blood and is used as a screening test for abnormal thyroid function and thyroid replacement treatment. TSH, a hormone produced in the hypothalamus, stimulates the pituitary gland to release TSH. TSH subsequently stimulates the thyroid to produce thyroid hormone, T3 and T4.

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MyMedLab Product ID: 216