Hypothyroidism
Hypothyroidism (underactive thyroid) is a condition where your thyroid gland doesn't produce enough hormones. It affects up to 15% of Americans, and is 6 times more common in women than men.
Untreated hypothyroidism can cause a number of health problems, including high cholesterol, heart disease, infertility and depression. A few simple blood tests can help diagnose hypothyroidism.