Twenty-four-hour urinary water-soluble vitamin levels correlate with their intakes in free-living Japanese schoolchildren

Public Health Nutrition

Tsutomu Fukuwatari¹  Tomiko Tsuji¹  Satoshi Sasaki¹  Katsumi Shibata¹ 

关键词: Urinary water-soluble vitamin;    Biomarker;    Free-living;    Japanese schoolchildren;   

DOI  :  10.1017/S1368980010001904

学科分类：卫生学

来源: Cambridge University Press

【 摘 要 】

ObjectiveTo examine the association between 24 h urinary water-soluble vitamin levels and their intakes in free-living Japanese schoolchildren.DesignAll foods consumed for four consecutive days were recorded accurately by a weighed food record. A single 24 h urine sample was collected on the fourth day, and the urinary levels of water-soluble vitamins were measured.SettingAn elementary school in Inazawa City, Japan.SubjectsA total of 114 healthy, free-living, Japanese elementary-school children aged 10–12 years.ResultsThe urinary level of each water-soluble vitamin was correlated positively to its mean intake in the past 2–4 d (vitamin B1: r = 0·42, P < 0·001; vitamin B2: r = 0·43, P < 0·001; vitamin B6: r = 0·49, P < 0·001; niacin: r = 0·32, P < 0·001; niacin equivalents: r = 0·32, P < 0·001; pantothenic acid: r = 0·32, P < 0·001; folic acid: r = 0·27, P < 0·01; vitamin C: r = 0·39, P < 0.001), except for vitamin B12 (r = 0·10, P = NS). Estimated mean intakes of water-soluble vitamins calculated using urinary levels and recovery rates were 97–102 % of their 3 d mean intake, except for vitamin B12 (79 %).ConclusionsThe results show that urinary levels of water-soluble vitamins, except for vitamin B12, reflected their recent intakes in free-living Japanese schoolchildren and could be used as a potential biomarker to estimate mean vitamin intake.

【 授权许可】

Unknown