Free T3 (fT3)
Free Triiodothyronine (fT3) is one of the two primary thyroid hormones, playing a crucial role in regulating metabolism, heart rate, and body temperature. Unlike total T3, fT3 represents the unbound hormone available for immediate use by the body, making it a critical indicator of thyroid function....
Description
Individuals with symptoms of thyroid imbalance, such as fatigue, weight changes, or mood swings, should test their fT3. It’s also crucial for those being treated for thyroid disorders to monitor treatment effectiveness.
Imbalanced fT3 can cause symptoms like unexpected weight loss or gain, heart rate irregularities, temperature sensitivity, anxiety, and fatigue.
Free T3 measures the unbound, active form of the hormone, while Total T3 includes both bound and unbound hormone. Free T3 provides a more accurate picture of the hormone readily available for use by the body.
High fT3 levels can indicate hyperthyroidism, while low levels may suggest hypothyroidism. It’s important in understanding thyroid gland activity and overall metabolism.
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