Triiodothyronine

Triiodothyronine, commonly known as T3, is a hormone produced by the thyroid gland that plays a key role in regulating the body's metabolism. It helps control how fast the body uses energy, influences body temperature, heart rate, and overall growth and development. T3 is derived from another hormone called thyroxine (T4) and acts on various tissues to increase metabolic activity. Proper levels of T3 are essential for maintaining overall health, while imbalances can lead to conditions like hypothyroidism (low levels) or hyperthyroidism (high levels).