Ashley Price felt terrible. She was tired, dizzy spells came and went, dark splotches popped up on her chest for no reason, and she'd gained 50 pounds in two years. Some days she was starving; other days she could barely eat. Her doc suggested that her problems would go away if Price just ate less and exercised more, even though she was dieting and working out regularly. Price demanded thyroid tests, only to have them come back normal.