"Since the American diet provides 800–1200 milligrams of calcium per day, supplements are not needed in most instances. Furthermore, in other countries throughout Asia where calcium intake levels are far lower (400–600 mg per day) than in Western countries, there are lower hip fracture rates among older females.
Oddly, most bone-mineral dietary supplements offered on store shelves today only provide calcium, magnesium and a smidgen of vitamin D. Two key nutrients identified in this report – vitamin K and IP6 phytate – are not found in any dietary supplements designed to promote bone health. "
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