T4

194.00

A T4 test is used to check how well your thyroid is working. It’s also used to help diagnose and monitor thyroid disease and conditions that may affect your thyroid, including:

Hypothyroidism, or underactive thyroid, which is when your thyroid gland doesn’t make enough thyroid hormone to meet your body’s needs
Hyperthyroidism, or overactive thyroid, which is when your thyroid gland makes more thyroid hormone than your body needs
Disorders of the pituitary gland, which is a gland at the base of your brain that makes TSH (thyroid stimulating hormone). TSH controls how much T4 your thyroid gland makes. If the results from a TSH test aren’t normal, a T4 test can help diagnose whether the problem is with your thyroid or your pituitary gland.
In certain cases, a T4 test may be done as part of a group of tests called a thyroid panel. A thyroid panel includes a test for TSH as well as other thyroid tests.

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