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Help for the second most common hormone problem in the U.S.

	An underactive thyroid can make you feel tired and depressed. You may also gain weight or have dry skin or hair. ConsumerReportsHealth.org can help you find treatments for underactive thyroid that work well.
	Subscribe to ConsumerReportsHealth.org today to find out which hormone medication rates best for treating underactive thyroid.

Consumer Reports Health explains the best and most up-to-date expert research and evidence about treating an underactive thyroid. Our clear and sound advice helps you and your doctor choose your best treatment options.

Key points for people with an underactive thyroid

• An underactive thyroid is common in women. About 1 in 10 women over 60 have a mild form of the condition.
• The most common cause of an underactive thyroid is when the body's immune system attacks its own thyroid gland.
• You can take pills to replace the hormones your thyroid should be making. You'll usually need to take these for the rest of your life.

If you're getting symptoms from an underactive thyroid, doctors agree that it's important to get treatment, even though there's not much research on this.

Our in-depth condition report and Treatment Ratings table will help you and your doctor decide which treatment for an underactive thyroid is right for you. As a Consumer Reports Health subscriber, we'll also help you sort through the best research and the most effective treatments for over 100 conditions and illnesses that may affect you and your family.