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Best Answer: Yes there is a link between having an underactive thyroid and having high cholesterol. In someone with high cholesterol, thyroid function is usually one of the first things that gets investigated.
Hyperthyroidism, or an overactive thyroid, can cause symptoms like anxiety, nervousness, irritability, restlessness, sweating, and a rapid or irregular heartbeat. These symptoms are the result of overproduction of the hormone thyroxine, which speeds up your body's metabolism.