Thyroxine (T4)

Thyroxine, or T4, is a hormone produced by the thyroid gland, which is located in the neck. It plays a crucial role in regulating metabolism, the process by which the body converts food into energy. T4 helps control how fast the body uses energy, makes proteins, and responds to other hormones. Proper levels of T4 are essential for growth, development, and overall health. If the thyroid produces too much or too little T4, it can lead to health issues such as hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid), affecting many bodily functions.