Deuster P A, Gallagher K L, Singh A, Reynolds R D
Department of Military Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814-4799.
J Am Diet Assoc. 1992 Nov;92(11):1372-5.
Intake of energy zinc, copper, and vitamin B-6 and indexes of zinc, copper and vitamin B-6 status were determined for eight men who consumed a high-carbohydrate dehydrated ration for 31 days of high activity at moderate altitudes (2,400 to 4,300 m). Data were collected 2 months before exposure (PRE), four times during the month at moderate altitudes (ALT), and 1 month after return (RET). Mean (+/- standard error) energy intake was 2,725 +/- 215, 3,430 +/- 79, and 3,370 +/- 215 kcal/day during PRE, ALT, and RET, respectively. Zinc and copper intakes averaged 10.6 +/- 1.6 and 1.0 +/- 0.1 mg/day during PRE and increased significantly to 16.9 +/- 0.7 and 3.5 +/- 0.1 mg/day during ALT; zinc and copper intakes were 15.5 +/- 1.6 and 1.9 +/- 0.3 mg/day for RET, respectively. Similarly, vitamin B-6 intake was significantly higher during ALT (PRE = 2.2 +/- 0.5 mg/day; ALT = 4.2 +/- 0.4 mg/day; and RET = 2.6 +/- 0.4 mg/day) as compared with PRE and RET. No significant changes were noted for plasma zinc, copper, or their related proteins or plasma or erythrocyte pyridoxal-5'-phosphate. Finally, no changes in urinary excretion of zinc were observed. The results indicate that dehydrated rations provide zinc, copper, and vitamin B-6 in amounts above the Recommended Dietary Allowances. Such diets may be consumed for at least 1 month without compromising status for these nutrients.
对8名男性进行了能量、锌、铜和维生素B-6摄入量以及锌、铜和维生素B-6状态指标的测定，这些男性在中等海拔（2400至4300米）进行31天高活动量期间食用高碳水化合物脱水口粮。在暴露前2个月（PRE）、中等海拔期间的1个月内分4次（ALT）以及返回后1个月（RET）收集数据。在PRE、ALT和RET期间，平均（±标准误差）能量摄入量分别为2725±215、3430±79和3370±215千卡/天。PRE期间锌和铜的摄入量平均分别为10.6±1.6和1.0±0.1毫克/天，在ALT期间显著增加至16.9±0.7和3.5±0.1毫克/天；RET时锌和铜的摄入量分别为15.5±1.6和1.9±0.3毫克/天。同样，与PRE和RET相比，ALT期间维生素B-6的摄入量显著更高（PRE = 2.2±0.5毫克/天；ALT = 4.2±0.4毫克/天；RET = 2.6±0.4毫克/天）。血浆锌、铜或其相关蛋白以及血浆或红细胞磷酸吡哆醛-5'-磷酸均未观察到显著变化。最后，未观察到锌尿排泄的变化。结果表明，脱水口粮提供的锌、铜和维生素B-6量高于推荐膳食摄入量。此类饮食可食用至少1个月而不会损害这些营养素的状态。
