What is the effect of estrogen on bone health?

• A. It promotes bone resorption
• B. It enhances muscle growth
• C. It inhibits bone resorption
• D. It decreases calcium excretion

Answer: (C)

Estrogen plays a vital role in maintaining bone health, primarily through its ability to inhibit bone resorption. It accomplishes this by decreasing the activity and lifespan of osteoclasts, the cells responsible for breaking down bone tissue. By reducing the number and activity of these cells, estrogen helps to maintain bone density and reduces the risk of osteoporosis and fractures.

In a healthy hormonal environment, estrogen promotes a balance between bone formation and resorption, ensuring that bones remain strong and resilient. This protective effect is especially critical during aging, where declines in estrogen levels, such as those that occur after menopause, can lead to increased bone resorption, thus heightening the risk of skeletal complications.

Although estrogen has various effects on other tissues, its role in the inhibition of bone resorption is fundamental for preserving bone health and integrity throughout life.