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This efficiency is enhanced by good general health, physical activity, and consumption of the proper amounts of vitamin D and phosphorus. Factors having a negative influence on calcium absorption are emotional stress, certain medications, and even increasing age. The Recommended Dietary Allowance (RDA) for calcium is 800 milligrams for children, 1,200 milligrams for teenagers and pregnant and lactating women, and 800 milligrams for adults.
Studies show that many Americans consume only marginal amounts of calcium in their daily di
80.2%