What is the primary effect of hyperthyroidism on bone health?

• A. Increases calcium absorption
• B. Inhibits bone turnover
• C. Promotes bone remodeling
• D. Increases parathyroid hormone secretion

Answer: (B)

The primary effect of hyperthyroidism on bone health is that it promotes bone remodeling. In individuals with hyperthyroidism, the thyroid gland produces excess thyroid hormones, which can lead to an increase in bone resorption, a process where bone is broken down, and minerals like calcium are released into the bloodstream. This increased bone turnover can result in a net loss of bone density over time, leading to conditions such as osteoporosis.

While hyperthyroidism does lead to altered calcium metabolism, it primarily affects bone health by increasing bone loss rather than increasing calcium absorption. Additionally, it does not inhibit bone turnover; instead, it enhances it, disrupting the balance between bone formation and resorption. Hyperthyroidism does not directly increase parathyroid hormone secretion; rather, the condition can affect the regulatory mechanisms of calcium homeostasis in the body.

Thus, the main impact of hyperthyroidism on bone health is reflected through its promotion of bone remodeling, which can ultimately compromise bone integrity and increase fracture risk.