Overtreating an Underactive Thyroid Can Harm the Heart

A surge in energy belies dangerous things happening behind the scenes.


You may think of the heart as the body’s engine, but the heart’s function is actually also governed by the thyroid gland. This small gland at the base of the neck produces hormones that regulate many vital functions in your body, including your heart rate, breathing, cholesterol levels, nerve conduction, body temperature, weight and much more.

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