Free T4 Test (Thyroxine)

The Free Thyroxine (FT4) test measures the level of free thyroxine in your blood. Thyroxine (T4) is a hormone produced by the thyroid gland, which plays a key role in regulating metabolism, energy production, and overall growth and development.

Why consider this Test?

• Assess thyroid function: This test helps determine how well your thyroid gland is functioning.
• Diagnose thyroid disorders: It is commonly used to diagnose thyroid conditions like hypothyroidism (underactive thyroid) or hyperthyroidism (overactive thyroid).
• Monitor treatment: If you're undergoing treatment for thyroid problems, the FT4 test can help monitor the effectiveness of medications.

Who should get this Test Done?

• For Hypothyroidism (underactive thyroid): Fatigue, weight gain, depression, and sensitivity to cold.
• For Hyperthyroidism (overactive thyroid): Unexplained weight loss, rapid heartbeat, anxiety, and sensitivity to heat.
• To evaluate thyroid function in combination with other tests like TSH (Thyroid Stimulating Hormone) and T3 (Triiodothyronine).
• If you’re undergoing treatment for thyroid disease and your doctor wants to monitor your hormone levels.

More about test :

• Low FT4 levels: May indicate hypothyroidism, where the thyroid is not producing enough thyroid hormone.
• High FT4 levels: May indicate hyperthyroidism, where the thyroid is overactive and producing too much thyroid hormone.