A Thyroid Function Test (TFT) is a group of blood tests that evaluate how well your thyroid gland is working. It typically includes TSH, T3, and T4 levels. These hormones regulate metabolism, energy production, body temperature, heart rate, and overall growth. Abnormal thyroid function can lead to symptoms such as fatigue, weight changes, hair fall, anxiety, mood swings, or irregular heartbeat. TFT helps detect conditions like hypothyroidism, hyperthyroidism, and other thyroid disorders.

For the TFT, a small blood sample is collected from a vein, and no fasting or special preparation is required. Doctors often recommend this test when thyroid-related symptoms are present or when monitoring ongoing thyroid treatment. The combined results of TSH, T3, and T4 provide a complete picture of thyroid health and help guide accurate diagnosis and treatment.