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TABLE F-1 Adequate Intake (AI) for Calcium

Life Stage Group

AI (mg/d)

Basis for AI

51–70 y


Desirable calcium retention, factorial, ∆BMD

> 70 y


Extrapolation from AI for 51–70 y (desirable calcium retention), ∆BMD, fracture rate

Pregnancy and lactation, <18 y


Bone mineral mass

Pregnancy and lactation, 19–50 y


Bone mineral mass

a Unless noted otherwise, all studies were performed in the United States or Canada.

b ∆BMC = change in bone mineral content.

c ∆BMD = change in bone mineral density.

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