Bone Density

In Depth

Bone density refers to the amount of bone mineral in bone tissue, typically measured using a DEXA scan (dual-energy X-ray absorptiometry). It is a key indicator of bone strength and is crucial for assessing the risk of osteoporosis and fractures. Throughout life, bone is constantly being remodeled—old bone is broken down (bone resorption) and new bone is formed (bone formation).

Estrogen plays a vital role in maintaining bone density by slowing down bone resorption and promoting bone formation. During perimenopause and after menopause, the significant decline in estrogen levels disrupts this delicate balance. Bone resorption begins to outpace bone formation, leading to a gradual loss of bone density. This accelerated bone loss is most pronounced in the first few years after menopause and can significantly increase the risk of fractures.

Low bone density, or osteopenia, is a precursor to osteoporosis, a condition characterized by weakened bones that are more susceptible to fractures, particularly in the hip, spine, and wrist. The loss of bone density is often silent, with no symptoms until a fracture occurs. Therefore, screening for bone density is recommended for women around the age of menopause, especially those with risk factors.

Maintaining adequate bone density is critical for preserving mobility and independence in later life. Strategies to support bone health include adequate calcium and vitamin D intake, regular weight-bearing exercise, and for women experiencing menopausal hormone loss, hormone therapy which is highly effective in preserving bone density.

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