a large ductless gland in the neck which secretes hormones regulating growth and development through the rate of metabolism. A condition in which the thyroid gland does not produce enough thyroid hormone.
Hypothyroidism's deficiency of thyroid hormones can disrupt such things as heart rate, body temperature, and all aspects of metabolism. Hypothyroidism is most prevalent in older women.
Major symptoms include fatigue, cold sensitivity, constipation, dry skin, and unexplained weight gain.