What Is Osteoporosis?

Osteoporosis is a condition in which bones become less dense and more porous, making them fragile and prone to fracture. The name literally means "porous bone." It's often called a "silent disease" because bone loss happens gradually, with no obvious symptoms — until a fracture occurs, often from a relatively minor fall or impact.

Osteoporosis is most common in older adults, particularly postmenopausal women, but it can affect men and younger people too, especially in the presence of certain risk factors.

How Bone Loss Happens

Bone is living tissue that continuously breaks down and rebuilds in a process called bone remodeling. During childhood and early adulthood, new bone is made faster than old bone is removed — which is why peak bone mass is reached in the mid-to-late twenties. After around age 35, bone loss gradually begins to outpace bone formation.

In osteoporosis, this imbalance becomes more severe. The internal honeycomb structure of the bone weakens, reducing its ability to absorb force and resist fracture.

Who Is Most at Risk?

Several factors increase the likelihood of developing osteoporosis:

  • Age: Bone density naturally declines with age.
  • Sex: Women — especially after menopause — lose bone faster due to declining estrogen levels.
  • Family history: A parent with osteoporosis or hip fractures increases your risk.
  • Low body weight: Less mechanical loading on bones reduces bone-building signals.
  • Smoking: Reduces bone density and impairs calcium absorption.
  • Excessive alcohol: Interferes with calcium balance and bone cell activity.
  • Low calcium and vitamin D intake: Both are essential for bone formation.
  • Sedentary lifestyle: Weight-bearing exercise is critical for stimulating bone growth.
  • Certain medications: Long-term corticosteroid use is a significant risk factor.
  • Underlying conditions: Including celiac disease, inflammatory bowel disease, and rheumatoid arthritis.

Diagnosing Osteoporosis

The standard diagnostic test is a DEXA scan (dual-energy X-ray absorptiometry), which measures bone mineral density (BMD) at the hip and spine. Results are reported as a T-score:

  • -1.0 or above: Normal bone density
  • -1.0 to -2.5: Osteopenia (low bone density, precursor to osteoporosis)
  • -2.5 or below: Osteoporosis

Guidelines vary by country, but DEXA scans are generally recommended for women over 65, men over 70, and younger individuals with significant risk factors.

Prevention Strategies

Build and Maintain Bone Density Early

The more bone mass you build in youth and early adulthood, the more resilience you have against age-related losses. Adequate calcium, vitamin D, and regular weight-bearing exercise during childhood and the teenage years create a strong foundation.

Nutrition

Ensure adequate intake of calcium (found in dairy, leafy greens, fortified foods, almonds) and vitamin D (sunlight, oily fish, fortified foods, and supplements if needed). Protein also plays a role in maintaining bone structure.

Exercise

Weight-bearing activities like walking, dancing, hiking, and strength training stimulate bone remodeling and maintain density. Exercise also improves balance and reduces the risk of falls — a major cause of fracture in people with osteoporosis.

Lifestyle Choices

Quit smoking, limit alcohol, and review any long-term medications with your doctor to assess their impact on bone health.

Medical Treatment

For those with diagnosed osteoporosis, a doctor may prescribe medications such as bisphosphonates, denosumab, or other bone-building therapies. These are used alongside lifestyle measures, not instead of them.

The Takeaway

Osteoporosis is largely preventable with the right habits started early — and manageable even after diagnosis. Regular screening, especially if you have risk factors, allows for timely intervention well before a fracture occurs.