The USRDA for teenage girls up to age 18 is 1300 mg of calcium per day.

18岁以上的女孩每天钙营养推荐量是1300mg。

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As people age and their bones weaken, he said: “Those who had adequate vitamin D and calcium will slide down from the top of the mountain.

当年老之时，他们骨骼脆弱，他说道：“那些摄取了充分的维生素D和钙的将从山顶滑落。

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About 61% of women over the age of 60 take calcium, compared with only 28% in 1988-1994.

近61%的60岁以上女性补钙，而1988—1994年这一比例只有28%。

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Men should take 1, 000 mg of elemental calcium from age 19 to age 70 and increase to 1, 200 mg at age 71.

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Age and calcium had combined effects.

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About 61% of women over the age of 60 take calcium, compared with only 28% in 1988-1994.

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