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Calcium needs vary with age. The Food and Nutrition Board (FNB) of the Institute of Medicine of the National Academies provides guidelines on the amount of calcium needed each day.
Recommended Daily Allowance in Milligrams (mg)
| Life Stage Group | Recommended Daily Calcium Intake |
| Women and men 9 to 18 years | 1,300 mg |
| Women and men 19 to 50 years | 1,000 mg |
| Women 51 to 70 years | 1,200 mg |
| Men 51 to 70 years | 1,000 mg |
| Women and men > 70 years | 1,200 mg |
| Pregnant or nursing women 14 to 18 years | 1,300 mg |
| Pregnant or nursing women 19 to 50 years | 1,000 mg |
Reprinted and adapted with permission from Tables S-1 and S-2, Dietary Reference Intakes for Calcium and Vitamin D, 2011 by the National Academy of Sciences, Courtesy of the National Academies Press, Washington, D.C.
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