What is the primary effect of menopause on bone health?

What is the primary effect of menopause on bone health?

• A. Estrogen deficiency after menopause accelerates bone resorption, leading to rapid bone loss.
• B. Increased calcium absorption accelerates bone formation.
• C. Vitamin D deficiency solely causes osteoporosis.
• D. Decreased parathyroid hormone reduces bone turnover.

Answer: (A)

Estrogen is a key regulator of bone remodeling, keeping the balance between bone formation and bone resorption. After menopause, the fall in estrogen removes this braking effect on osteoclasts, so signals that promote osteoclast formation and activity (notably RANKL) rise while protective signals (like OPG) fall. The result is increased osteoclast-mediated bone resorption outpacing formation, leading to rapid bone loss. This loss is most pronounced in trabecular-rich sites such as the spine, contributing to a higher risk of osteoporosis and fractures in the early postmenopausal years. Other options don’t capture this primary mechanism: calcium absorption, vitamin D deficiency alone, or decreases in PTH are not the central driver of menopause-related bone loss.

Estrogen is a key regulator of bone remodeling, keeping the balance between bone formation and bone resorption. After menopause, the fall in estrogen removes this braking effect on osteoclasts, so signals that promote osteoclast formation and activity (notably RANKL) rise while protective signals (like OPG) fall. The result is increased osteoclast-mediated bone resorption outpacing formation, leading to rapid bone loss. This loss is most pronounced in trabecular-rich sites such as the spine, contributing to a higher risk of osteoporosis and fractures in the early postmenopausal years. Other options don’t capture this primary mechanism: calcium absorption, vitamin D deficiency alone, or decreases in PTH are not the central driver of menopause-related bone loss.