Fractures, calcium, and the modern diet.

Area of Science:

• Nutritional Science
• Gerontology
• Epidemiology

Background:

• High calcium intake is recommended for osteoporosis prevention, but evidence for fracture prevention is limited.
• Osteoporotic fractures are prevalent in Western societies, similar to coronary artery disease.
• Statins and diets rich in fruits and vegetables show potential in fracture prevention.

Purpose of the Study:

• To investigate the effectiveness of high calcium intake in preventing fractures.
• To explore potential common etiologic factors for osteoporotic fractures and cardiovascular disease.
• To understand why low-calcium diet populations experience fewer fractures than high-calcium diet populations.

Main Methods:

• Review of existing evidence on calcium intake, statins, and fracture risk.
• Epidemiological comparison of fracture rates in populations with varying dietary calcium consumption.
• Analysis of potential shared dietary factors influencing bone health and cardiovascular risk.

Main Results:

• Limited evidence supports high calcium intake for preventing osteoporotic fractures.
• Statins and fruit/vegetable-rich diets are associated with reduced fracture risk.
• Populations with low-calcium diets exhibit lower fracture rates than Western societies.

Conclusions:

• Current recommendations for high calcium intake to prevent fractures may be insufficient.
• Dietary factors beyond calcium, potentially shared with cardiovascular health, are critical for fracture prevention.
• Further research is needed to elucidate the mechanisms behind lower fracture rates in low-calcium diet populations.