Thyroid Hormone Therapy is a medical treatment used to manage conditions related to the thyroid gland, which regulates metabolism and energy levels in the body. This therapy typically involves the use of synthetic hormones, such as levothyroxine, to replace or supplement the hormones that the thyroid is not producing adequately. Patients may require this therapy for conditions like hypothyroidism, where the thyroid is underactive, leading to symptoms like fatigue and weight gain. Regular monitoring and dosage adjustments are essential to ensure that hormone levels remain balanced and to minimize potential side effects.