Gallery 25 Things People with an Underactive Thyroid Understand Tammie McKay2019-07-23T15:20:08+00:00 Did you know there are more than 3 million cases of hypothyroidism diagnosed each year in the U.S. 25 Things People with an Underactive Thyroid UnderstandTammie McKay2019-07-23T15:20:08+00:00