期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：1994
卷号：40
期号：1
页码：11-22
DOI：10.3177/jnsv.40.11
出版社：Center for Academic Publications Japan
摘要：To determine the vitamin B2 supply, 62 athletes in various types of sports and 16 non-athletes were examined, using a weighed food record (7-day), α-EGR determination, microbiological blood, and HPLC urinary measurements. If the guidelines of 1.5 or 1.7mg/day vitamin B2 or 0.6 mg/4, 184 kJ (GRDA) are defined for adequate status, all sports groups (M±SEM) are above this level. The vitamin B2 blood concentra-tions show a range (mean) from 303-372 nmol/liter, which indicates that more than 90% of the athletes are above the reference value of 327 nmol/liter (mean). There is a correlation of r =0.49 between the vitamin B2 intake (mean over 7 days) and the vitamin B2 blood level. Determina-tion of vitamin B2 blood concentration is characterized by good precision (C. V.±3.2%) and recovery (95.7%). The enzyme activation measure-ment (α-EGR) shows that all of the athletes are below the α-EGR reference value of < 1.50 (good supply). No significant correlations could be determined between α-EGR and vitamin B2 intake, blood concentrations, and urinary excretion. The measurement also shows high precision (C. V. 1.7%). The Vitamin B2 excretion in urine (μmol/g Cr.) was higher than the reference values for non-athletes in more than 90% of the athletes. There is a correlation of r =0.89 between the vitamin B2 intake on the last day (Day 7) of the food record and the riboflavin excretion, and between vitamin B2 in blood and urinary excretion of r =0.52. The C. V. of vitamin B2 urinary measurement using HPLC is 2.5%, with recovery of 98.2%. Combined measurement of vitamin B2 intake, blood concentration, and urine excretion appears to be a suitable proce-dure for determining the vitamin B2 status. Most of the performance athletes were sufficiently supplied with vitamin B2, compared to the reference values for non-athletes.
