成年人膳食矿物质摄入与机体矿物质营养状况的关系初探

目的探讨膳食矿物质摄入与机体矿物质营养状况的关系。方法采用24 h回顾法调查研究对象3 d膳食,计算其营养素摄入量,并进行评价;同时收集研究对象血液和尿液,测定其中矿物质钙、镁、铁、锌、铜、锰、硒水平。结果研究对象中男性锌、硒、维生素B1(VB1)、维生素B2(VB2)和维生素C(VC)摄入不足的比例分别为35.8%、19.4%、71.6%、61.2%和70.1%;女性分别为6.8%、27.0%、59.5%、36.5%和36.5%。男性膳食钙、镁、铁、铜、锰和维生素E的平均摄入量分别为AI的67.8%、91.5%、140.8%、101.0%、187.4%和199.1%,膳食钙存在摄入不足;女性膳食钙、镁、铁、铜、锰和维生素E的平均摄入量分别为AI的56.2%、75.4%、92.9%、94.0%、157.7%和181.7%。膳食铁与血浆铁含量存在正相关关系(r=0.263,P<0.05),膳食铜与尿铜之间存在负相关关系(r=-0.298,P<0.05),膳食中其他元素均与该元素在血浆、红细胞和尿液中含量无相关性(P>0.05)。结论调查对象存在膳食营养素摄入不足,应适当补充微量营养素。膳食矿物质摄入与机体该元素水平之间无直接相关关系。

THE PRELIMILARY STUDY ON THE RELATION BETWEEN DIETARY INTAKES WITH MINERAL STATUS IN ADULTS

Objective To explore the relationship between mineral intakes and the mineral status of the healthy adults.Method A 3-d dietary survey was conducted by 24-h dietary recall on each subject to abtain the intakes of nutrinents.Blood and urine samples were collected to assess the minerals status of the subjects.Results The percentage below EARs of Zn,Se,VB1,VB2,and VC for male was 35.8%,19.4%,71.6%,61.2% and 70.1% respectively,and for female was 6.8%,27.0%,59.5%,36.5% and 36.5% respectively.The mean intake of Ca,Mg,Fe,Cu,Mn and VE of was 7.8%,91.5%,140.8%,101.0%,187.4% and 199.1% and 6.2%,75.4%,92.9%,94.0%,157.7% and 181.7% of AI in male and female respectively.There was positive correlation between total iron intake with plasma iron(r=0.263,P<0.05).Dietary copper intake was negatively correlated with urine copper(r=-0.298,P<0.05).No correlation between dietary intakes of other minerals and their status was found(P>0.05).Conclusion Dietary supplements should be used to improve the inadequcy of some dietary minerals.The dietary iron intake was positively correlated with plasma iron.The dietary copper intake was negatively correlated with urinary copper.No correlation was found between dietary intake and the status in other minerals.