钙
化学
动物科学
内分泌学
钙代谢
内科学
医学
生物
作者
Herta Spencer,Lois Kramer
出处
期刊:PubMed
日期:1986-11-01
卷期号:45 (12): 2758-62
被引量:1
摘要
Studies carried out under strictly controlled conditions during different calcium intakes in adult males have shown that the average calcium balance was only slightly positive (+22 mg/day) during a calcium intake of 800 mg/day, the recommended dietary calcium intake, not taking into consideration dermal losses of calcium. During this calcium intake, the calcium balances were negative in 34% of the subjects studied. Increasing the calcium intake to 1200 mg/day resulted in a significant increase of the calcium balance; further increases to different intake levels up to 2300 mg/day did not improve the calcium balance further. Increasing the phosphorus intake up to 2000 mg/day as well as increasing the protein intake from 1 g/kg body weight to 2 g/kg, given as meat, did not have an adverse effect on calcium metabolism. A variety of drugs, notably aluminum-containing antacids, induced calcium loss. Increasing the calcium intake more than 10-fold from 200 to 2500 mg/day did not lower the blood pressure in a large number of normotensive patients and in a small number of hypertensive patients studied.
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