Vanderslice J T, Higgs D J
Nutrient Composition Laboratory, US Department of Agriculture, Beltsville, MD 20705.
Am J Clin Nutr. 1991 Dec;54(6 Suppl):1323S-1327S. doi: 10.1093/ajcn/54.6.1323s.
A recent survey of foods that constitute the major sources of vitamin C in the American diet yielded information on the total content of this vitamin as well as the amount of its two forms, ascorbic acid and dehydroascorbic acid (DHAA) in these foods. Samples of individual foods showed a surprising large range of vitamin content even for foods collected from the same regions of the country and from the same source. The amount of DHAA in the different foods varied from approximately 10% to 20% of the total vitamin content. The large range of values for the vitamin content in a given food suggests further that in human-diet studies, when the major sources of vitamin C are from a few foods, daily analyses are required for the necessary precision.
最近一项关于构成美国饮食中维生素C主要来源的食物的调查，得出了这些食物中该维生素的总含量及其两种形式——抗坏血酸和脱氢抗坏血酸（DHAA）的含量信息。即使是从该国同一地区和同一来源收集的食物样本，其维生素含量也显示出惊人的大范围差异。不同食物中DHAA的含量占维生素总含量的约10%至20%。给定食物中维生素含量的大范围数值进一步表明，在人体饮食研究中，当维生素C的主要来源是少数几种食物时，为了获得必要的精度，需要进行每日分析。
