Looker A, Sempos C T, Johnson C, Yetley E A
Division of Health Examination Statistics, National Center for Health Statistics, Hyattsville, Maryland.
J Am Diet Assoc. 1988 Jul;88(7):808-14.
Although vitamin-mineral supplement use is increasing in the United States, few researchers have examined whether supplement users have better nutritional status than do nonusers. Data from 10,515 persons examined in the second National Health and Nutrition Examination Survey (NHANES II) were used to compare mean dietary intakes of several nutrients and food groups, hemoglobin, mean corpuscular volume, transferrin saturation, erythrocyte protoporphyrin, and serum ferritin between regular supplement users and nonusers aged 16 to 74 years. Prevalences of impaired iron status also were compared between user groups. Users consumed more vitamin C and ate fruits and vegetables more frequently than did nonusers in all age/sex groups. No significant differences in mean iron status indicators were observed except in the 65 to 74 year age/sex groups: transferrin saturation among men and mean corpuscular volume, erythrocyte protoporphyrin, and serum ferritin among women. In each case, users had higher values than nonusers in this age group. Prevalences of impaired iron status did not differ between users and nonusers in any age/sex group. In general, iron status was not associated with supplement use.
尽管在美国维生素-矿物质补充剂的使用呈上升趋势，但很少有研究人员探究过补充剂使用者的营养状况是否优于非使用者。第二次全国健康和营养检查调查（NHANES II）中对10515人进行检查所获得的数据，被用于比较16至74岁的定期补充剂使用者和非使用者在几种营养素和食物组的平均膳食摄入量、血红蛋白、平均红细胞体积、转铁蛋白饱和度、红细胞原卟啉以及血清铁蛋白方面的差异。同时，还比较了不同使用者群体中铁缺乏状况的患病率。在所有年龄/性别组中，补充剂使用者比非使用者摄入了更多的维生素C，且更频繁地食用水果和蔬菜。除了65至74岁年龄/性别组外，未观察到平均铁状况指标存在显著差异：该年龄组男性的转铁蛋白饱和度，以及女性的平均红细胞体积、红细胞原卟啉和血清铁蛋白。在每种情况下，该年龄组的使用者这些指标的值均高于非使用者。在任何年龄/性别组中，补充剂使用者和非使用者之间铁缺乏状况的患病率均无差异。总体而言，铁状况与补充剂的使用无关。
