Overview
The thyroid gland, a part of the endocrine (hormone) system, plays a major role in regulating the body's metabolism.
Review Date 4/29/2022
Updated by: Sandeep K. Dhaliwal, MD, board-certified in Diabetes, Endocrinology, and Metabolism, Springfield, VA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.