In Tired of Being Sick and Tired, Dr. Michael Berglund addresses the surprising hidden reasons why so manypeople, may be struggling to overcome exhaustion, depression, and weight gain. If your thyroid isn't working properly, you can eat perfectly, take your vitamins, and still feel sick. What's worse, the typical blood test to determine low-functioning thyroid doesn't always give you the whole picture. Dr. Berglund explains the truth that your doctor may not be telling you.