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Pre test Information : No Special Preparation Needed
The thyroid gland is found in the neck, just below the Adam's apple. The thyroid gland produces hormones and regulates how your body uses energy as well as its sensitivity to other hormones.
T3 is a hormone produced by the thyroid called triiodothyronine. It also produces the hormone thyroxine, also known as T4. These hormones work together to regulate your body's temperature, metabolism, and heart rate.
The majority of T3 in your body binds to protein. T3 that does not bind to protein is known as free T3 and circulates in your blood unbound. The T3 total test, which is the most common type of T3 test, measures both types of T3 in your blood.
Your doctor may be able to determine if you have a thyroid problem by measuring the T3 in your blood.
Why do doctors order T3 tests?
If your doctor suspects a thyroid problem, he or she will usually order a T3 test.
Thyroid disorders may include:
- Hyperthyroidism occurs when your thyroid produces an excessive amount of thyroid hormone.
- Hypopituitarism occurs when your pituitary gland does not produce enough pituitary hormones.
- Hypothyroidism, either primary or secondary, occurs when your thyroid does not produce adequate amounts of thyroid hormones.
- Thyrotoxic periodic paralysis occurs when your thyroid produces excessive amounts of thyroid hormones, causing muscle weakness.
- Thyroid disorders can cause a variety of symptoms. You could, for example, have mental issues like anxiety or physical issues like constipation and menstrual irregularity.
Other symptoms that could occur include:
- fatigue and weakness
- Sleeping difficulties increased sensitivity to heat or cold weight loss or gain dry or puffy skin dry, irritated, puffy, or bulging eyes
- Hand tremors and hair loss
- elevated heart rate
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