How Thyroid Hormones Influence Metabolism, Mood, and the Brain

Thyroid hormones are chemical messengers produced by the thyroid gland that circulate through the bloodstream and influence cells throughout the body. Their primary role is the regulation of metabolism, but thyroid hormones also affect brain function, mood, cognition, and behavior. The Brain–Pituitary–Thyroid Axis Thyroid function is regulated through a three-step hormonal system known as the…