Triiodothyronine, commonly known as T3, is a thyroid hormone that plays a crucial role in regulating metabolism, energy production, and overall growth and development in the body. It is produced by the thyroid gland and is more potent than its counterpart, thyroxine (T4), despite being present in smaller amounts. T3 influences various physiological processes, including heart rate, digestion, and muscle function, making it an essential hormone in maintaining homeostasis.
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