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骨组织的正常生长和发育需要摄入适量的钙，这在２０岁以下的青少年和儿童特别重要。因此，为使成人的骨量达最高限，在不同年龄阶段就存在最佳钙摄入量。胎儿期钙沉积依赖母体钙营养状况，孕妇的最佳钙摄入量是１２００ｍｇ／ｄ；０～１２个月婴儿的最佳钙摄入量为４００～６００ｍｇ／ｄ，２～１０岁的儿童为８００ｍｇ／ｄ；１１～２４岁的青少年为１２００～１５００ｍｇ／ｄ；２５～４５岁成人钙摄入量为８００～１０００ｍｇ／ｄ；绝经期妇女为１０００～１５００ｍｇ／ｄ；６５岁以上老人以１５００ｍｇ／ｄ为最佳；哺乳期妇女的钙摄入量为１２００ｍｇ／ｄ。
The normal growth and development of bone tissue requires the intake of adequate amounts of calcium, which is of particular importance to adolescents and children under 20 years of age. Therefore, to maximize bone mass in adults, optimal calcium intake exists at different ages. Calcium deposition in the fetus is dependent on maternal calcium status and the optimal calcium intake for pregnant women is 1200 mg / day. The best calcium intake for infants aged 0-12 months is 400-600 mg / day, while children 2 to 10 years of age are 800 mg / day for adolescents aged 11-24 years; 800-1500 mg / day for adults aged 25-45; 1000-1500 mg / day for menopausal women; 1500 mg / d is the best; lactation women’s calcium intake of 1200mg / d.