Thyrotropin-releasing hormone (TRH)

Thyrotropin-releasing hormone (TRH) is a small signaling molecule produced in the brain that plays a key role in regulating the thyroid gland, which controls metabolism. TRH signals the pituitary gland to release thyroid-stimulating hormone (TSH). TSH then stimulates the thyroid to produce thyroid hormones, affecting energy levels, temperature, and overall metabolic rates. TRH helps maintain the balance of thyroid hormones in the body, responding to changes like cold temperatures or low hormone levels to ensure proper metabolic functioning.