期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：2004
卷号：50
期号：1
页码：19-25
DOI：10.3177/jnsv.50.19
出版社：Center for Academic Publications Japan
摘要：This study was conducted to estimate the requirements of calcium (Ca), mag-nesium (Mg) and phosphorus (P) in Japanese young adults. From 1986 to 2000, 109 vol-unteers (23 males, 86 females), ranging from 18 to 28 y old, took part in mineral balance studies after written informed consent was obtained. The duration of the study periods ranged from 5 to 12 d, with 2-4 d of adaptation. Foodstuffs used in each study were selected from those commercially available. The minerals present in diet, feces, urine and sweat were measured by atomic absorption spectrophotometer (Ca, Mg) or spectrophotometer (P). The dietary intakes of Ca, Mg and P ranged from 4.83-23.58, 2.44-7.83 and 13.46-45.69mg/kg BW/d, respectively, Dietary intake (Intake) of Ca was positively correlated to apparent absorption (AA.) ( r 2=0.425), which was also correlated with urine excretion (Urine) ( r 2=0.327) and balance (Bal) ( r 2=0, 382). Intake of Ca was slightly but significantly corre-lated with Bal ( r 2=0.036, p =0.048). The mean value and upper limit of the 95% confi-dence interval for the regression equation between Intake and Bal when balance is equal to zero (Mean and upper limit) for Ca were 11.752 and 12.555mg/kg BW/d, respectively, Intake of Mg was positively correlated to A.A. (r2=0.451), which was also correlated with Urine ( r 2=0.486) and Bal ( r 2=0.349). However, Intake of Mg was not correlated with Bal. Intake of P was positively correlated with A.A. ( r 2=0.959), which was also correlated with both Urine ( r 2=0.908) and Bal ( r 2=0.135). Intake of P was slightly but significantly corre-lated with Bal ( r 2=0.103, p =0.0013). Mean and upper limits for P were 22.584 and 24.059mg/kg BW/d, respectively. Intakes of Mg and P correlated negatively with their respective A.A, rates (%) ( r 2=0.120 for Mg, r2 =0.109 for P). However, there was not much of a correlation for Ca. Balance of Ca was positively correlated with that of Mg ( r 2=0.541), but not with that of P.
