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Calcium: Calcium is the nutrient consistently found to be the most important for attaining peak bone mass and preventing osteoporosis. Adequate vitamin D intake is required for optimal calcium absorption. Adequate calcium and vitamin D are deemed essential for the prevention of osteoporosis in general, including postmenopausal osteoporosis.A woman needs between 1,200-1,500 milligrams of elemental calcium daily. The key factor to consider when buying calcium supplements is the amount of elemental calcium they contain. The term "elemental calcium" refers to the amount of calcium in a supplement that is available for the body to absorb. Most calcium supplements list the amount of elemental calcium on the label. But some brands list only the total weight, in milligrams (mg), of each tablet. This is the weight of the calcium plus other ingredients in the tablet, such as carbonate, citrate, lactate, or gluconate. Read more
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