Free T3 (triiodothyronine) Blood Tests

The Free T3 test is a blood test that measures the levels of a hormone called triiodothyronine in your body. Triiodothyronine is a hormone produced by the thyroid gland, which is located in your neck. This hormone plays a crucial role in regulating your metabolism, energy levels, and body temperature.

The Free T3 test is often helps determine if you have an overactive thyroid (hyperthyroidism) or an underactive thyroid (hypothyroidism).

If your Free T3 levels are too high, it may indicate that your thyroid gland is producing too much hormone, leading to symptoms like weight loss, rapid heartbeat, and anxiety. On the other hand, if your Free T3 levels are too low, it may suggest that your thyroid gland is not producing enough hormone, causing symptoms such as fatigue, weight gain, and feeling cold all the time.

By measuring your Free T3 levels, doctors can diagnose thyroid disorders and develop a treatment plan to help restore the balance of hormones in your body.

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