核黄素营养状况评价方法的研究

Studies on the Evaluation of Riboflavin Status

对三所全托机构４～５岁儿童共１３２人，在核黄素摄入不同水平时，进行全血谷胱甘肽还原酶活性系数（ＢＧＲＡＣ）、２４小时尿核黄素排出量及负荷尿核黄素排出量测定，结果表明，在进行群体核黄素营养状况评价时，三项指标之间以及与核黄素摄入量之间相关显著且合理，三者可以达到一致结果。但是，ＢＧＲＡＣ比尿核黄素排出量变异小，更为灵敏和准确，在进行核黄素营养状况评价时，尤其是在进行个体评价时，ＢＧＲＡＣ应作为首选指标，尿核黄素排出量应谨慎使用。本文同时提出了上述三项指标进行４～５岁儿童核黄素营养评价时的参考界值。

lood glutathion reductase activity coefficient ( BGRAC ),24hr urinary riboflavin excretionand riboflavin excretion after loading test were measured at varying levels of riboflavin intakes on132 children,4～5y old age; It was found they were correlated well with each other and with ri-boflavin intakes when evaluating theriboflavin status of population group. However,BGRAC isa prefered method, especially when evaluating individual riboflavin status,It was less variable,more sensitive and acurate than the urinary riboflavin excretion methods Different critical values of the three riboflavin assessing measurements for 4～5y old children were also put forward.