Garry P J, Goodwin J S, Hunt W C, Gilbert B A
Am J Clin Nutr. 1982 Aug;36(2):332-9. doi: 10.1093/ajcn/36.2.332.
Vitamin C status in 270 free-living and healthy elderly was determined from dietary intakes and plasma levels of ascorbic acid. Mean dietary intake for women (n = 145) was 137 and 142 mg/day for men (n = 125). The median intake of supplemental ascorbic acid for women was 355 mg/day (n = 85) and 500 mg/day (n = 70) for men. The mean plasma ascorbic acid level for women was 1.30 mg/dl and was significantly higher than for men, 1.13 mg/dl. Less than 2% were at risk for developing clinical symptoms of hypovitaminosis C. It was estimated that intakes needed to maintain a plasma ascorbic acid level of 1.0 mg/dl would be 75 mg/day for women and 150 mg/day for men. Our data suggest that a different recommended dietary allowance for ascorbic acid should be considered for men and women.
通过饮食摄入量和血浆中抗坏血酸水平测定了270名自由生活的健康老年人的维生素C状况。女性（n = 145）的平均饮食摄入量为137毫克/天，男性（n = 125）为142毫克/天。女性补充抗坏血酸的摄入量中位数为355毫克/天（n = 85），男性为500毫克/天（n = 70）。女性血浆抗坏血酸平均水平为1.30毫克/分升，显著高于男性的1.13毫克/分升。不到2%的人有患维生素C缺乏临床症状的风险。据估计，要维持血浆抗坏血酸水平为1.0毫克/分升，女性的摄入量需要75毫克/天，男性需要150毫克/天。我们的数据表明，应考虑为男性和女性制定不同的抗坏血酸膳食推荐摄入量。
