The thyroid gland is a critical organ in your body that regulates metabolism. In this video, endocrinologist Jack Merendino, MD, discusses how the thyroid works and what can happen when it doesn't work properly.
The thyroid is a butterfly-shaped gland at the base of the throat that regulates metabolism. Hypothyroidism (underactive thyroid) slows down metabolism and can cause weight gain. Learn about hypothyroidism's other symptoms and treatment.
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