How do estrogen levels help protect bones before menopause?

Before menopause, estrogen plays a vital role in maintaining skeletal health by regulating the dynamic process of bone remodeling. It helps protect bones by stimulating bone formation and limiting bone resorption—the process by which bone tissue is broken down and assimilated. By balancing these opposing processes, estrogen helps preserve bone strength and maintain overall bone density throughout a woman's reproductive years.1

When estrogen levels decline significantly at the onset of menopause, this protective effect is lost, leading to an acceleration of bone loss. This increased rate of resorption often results in osteopenia or osteoporosis, conditions characterized by reduced bone mass and an increased risk of fractures.23