According to the Mayo Clinic, hormones produced by the thyroid gland have an enormous impact on health, affecting all aspects of metabolism — from the rate at which the heart beats to how quickly we burn calories.
As long as the thyroid releases the proper amounts of these hormones, all systems function normally. But sometimes your thyroid doesn't produce enough hormones, upsetting the balance of chemical reactions in your body. This condition is known as hypothyroidism, or underactive thyroid disease.
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