Osteoporosis Prevention Time

Time Window for Osteoporosis Prevention

A bone densitometry (DEXA) scan diagnoses osteoporosis when the T-score ≤ −2.5 at the lumbar spine, femoral neck or total hip. Bone mass usually peaks around age 30. After that you lose roughly 0.5–1% a year, and the loss speeds up once menopause or hypogonadism sets in.

Prevention rests on a few habits. Get calcium of 1000–1200 mg/day and vitamin D of 800–2000 IU/day, do weight-bearing and resistance exercise such as strength training, jumping or brisk walking, quit smoking and go easy on alcohol. Where it is warranted, doctors add antiresorptives (alendronate, denosumab) and anabolics.

Applications

Knowing roughly how many years of intervention it takes to push back osteoporosis helps with meal planning, scheduling DEXA scans (every 1–2 years for high-risk patients) and deciding when medication makes sense. WHO/FAO guidance and Brazil’s ABRASSO (Associação Brasileira de Avaliação Óssea) both stress getting started early, back in young adulthood.

FAQ

When should I start DEXA screening? Women from age 65, or sooner if menopause came before 45 or there are other risk factors. Men from 70, or earlier with secondary causes like corticosteroids or hypogonadism.

Does resistance training really build bone? Yes. The mechanical load wakes up osteoblasts and raises bone mineral density, mainly at the hip and spine, which are the spots most hit by fragility fractures.

Are bisphosphonates safe long term? Alendronate, risedronate and zoledronate are backed by decades of data. Doctors still recommend reviewing the treatment now and then, with a drug holiday after 3–5 years, to weigh the benefit against rare problems like atypical fractures or osteonecrosis of the jaw.