Which is NOT a typical sign of hyperfunctional thyroid?

• A. Weight loss
• B. Diarrhea
• C. Weight gain
• D. Increased metabolism

Answer: (C)

Hyperthyroidism speeds up the body's metabolism. That heightened metabolic activity typically leads to weight loss even when appetite may be increased, because calories are burned more rapidly. It also increases gut motility, which commonly causes diarrhea. The overall rise in metabolic rate also produces heat intolerance and signs like sweating and a faster heart rate. Weight gain, on the other hand, would indicate a slower metabolism or hypothyroidism, not a hyperactive thyroid. So weight gain is not a typical sign of a hyperfunctional thyroid.