Which hormone produced by the thyroid gland regulates the body's metabolism?

Thyroxine, also known as T4, is the key hormone produced by the thyroid gland that plays a crucial role in regulating the body's metabolism. It is responsible for controlling how fast the body's cells work, influencing the rate at which the body uses energy, produces proteins, and regulates other hormones. The production and release of T4 are triggered by the thyroid-stimulating hormone (TSH) from the pituitary gland, which is influenced by the body's energy needs.

An adequate level of thyroxine is essential for maintaining normal metabolic functions, including heart rate, body temperature, and overall energy levels. When thyroxine levels are optimal, they help ensure that metabolic processes occur efficiently, allowing the body to function properly.