Full formMedical & Health
T3stands forTriiodothyronine
Full Form of T3
What is T3?
Triiodothyronine, commonly known as T3, is one of the two major hormones produced by the thyroid gland, the other being thyroxine (T4). T3 is the more biologically active form and plays a crucial role in regulating metabolism, heart rate, body temperature, and overall energy balance. In the Indian healthcare system, T3 levels are routinely measured through blood tests to diagnose and monitor thyroid disorders such as hyperthyroidism, where elevated T3 indicates an overactive thyroid, or hypothyroidism, where levels are low. The test is prescribed by endocrinologists and general physicians, especially in urban hospitals and diagnostic centres across India. T3 is also a key topic in medical entrance exams like NEET and AIIMS, where students must understand its synthesis from T4 via deiodination, its feedback loop with TSH, and its clinical significance. Understanding T3 is essential for aspiring doctors and healthcare professionals managing thyroid-related conditions in a country where iodine deficiency and autoimmune thyroiditis are prevalent.
T3 का फुल फॉर्म
ट्राइआयोडोथायरोनिन
Example
The endocrinologist advised a T3 test along with TSH and T4 to confirm the diagnosis of Graves' disease in the patient.
T3 — frequently asked questions
What is the full form of T3?
The full form of T3 is Triiodothyronine, an active thyroid hormone that regulates metabolism and body functions.
What is the normal range of T3 in the blood?
The normal range for total T3 in adults is typically 80–200 ng/dL, though reference values may vary slightly between laboratories in India.
What is the difference between T3 and T4?
T3 (triiodothyronine) is more potent and acts faster than T4 (thyroxine), which is the precursor. T4 is converted to T3 in tissues to exert its effects.