Question

which is a common symptom that results from an overactive thyroid gland?
○ hair growth
○ weight loss
○ low insulin levels
○ onset of diabetes

Explanation:

An overactive thyroid (hyperthyroidism) speeds up metabolism. This increased metabolic rate often leads to weight loss as the body burns calories at a faster pace. Hair growth is not a typical symptom (hyperthyroidism may cause hair thinning), low insulin levels relate to diabetes (not thyroid), and diabetes onset is not a direct symptom of hyperthyroidism. So weight loss is the common symptom.

Answer:

weight loss