Triiodothyronine (T3) - PERLA Health

Triiodothyronine (T3)

Triiodothyronine (T3) is a hormone that is produced by the thyroid gland. It is often referred to as T3, as it contains 3 iodide atoms. T3 can also be produced by other tissues through conversion of Thyroxine (T4), the other thyroid hormone. T3 is important for muscle control, the development and function of the brain, heart and digestion, as well as for the metabolism and bones.


  1. Hormone Health Network (Endocrine Society). Thyroid Hormones. (accessed 8. August 2020)
  2. Cleveland Clinic. Thyroid Disease. (accessed 8. August 2020)
  3. WebMD. Picture of the Thyroid. (accessed 8. August 2020)

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