Feeling tired, lacking energy, and persistently in a low mood—these can all be signs of hypothyroidism, or an underactive thyroid. Hypothyroidism is the most common thyroid disorder in the United States, affecting about 5 in 100 Americans age 12 and older.
Although hypothyroidism is not typically curable, most cases are mild, cause few noticeable symptoms, and can be effectively managed.
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