title: Urinary excretion of vitamin B1, B2, B6, niacin, pantothenic acid, folate, and vitamin C correlates with dietary intakes of free-living elderly, female Japanese.
abstract: We hypothesized that 24-hour urinary excretion of water-soluble vitamins might correlate with their intake in free-living Japanese elderly females aged 70 to 84 years. We performed a cross-sectional study composed of 37 healthy, elderly, Japanese females living freely. All foods and the corresponding weights consumed for 4 consecutive days were recorded accurately. A 24-hour urine sample was collected on the fourth day, and the urinary content of water-soluble vitamins was measured. The urinary levels of all vitamins, except for B(12) (r = 0.01; P = .936), were correlated positively with the mean intake over the recent 4 days (vitamin B1: r = 0.62; P < .001; vitamin B2: r = 0.57; P < .001; vitamin B6: r = 0.37; P < .005; niacin: r = 0.54; P < .001; niacin equivalents: r = 0.54; P < .001; pantothenic acid: r = 0.59; P < .001; folate: r = 0.55; P = .001; and vitamin C: r = 0.53; P < .001). Mean estimated intakes of water-soluble vitamins calculated using urinary concentrations and recovery rates showed 96% to 107% of their 3-day mean intake, except for vitamin B12 (65%). We conclude that urinary levels of water-soluble vitamins, except for B12, reflected their recent intake in free-living Japanese elderly females and could be used as a measure of their intake during the previous few days both for group means and for individual rankings within a group.
authors.affiliation: Department of Health and Nutrition, School of Health and Human Life, Nagoya Bunri University, Aichi 492-8520, Japan.
authors.forename: Tomiko
authors.initials: T
authors.lastname: Tsuji
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Fukuwatari
authors.forename: Satoshi
authors.initials: S
authors.lastname: Sasaki
authors.forename: Katsumi
authors.initials: K
authors.lastname: Shibata
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001205:Ascorbic Acid / Q000008:administration & dosage* / Q000652:urine*; D003430:Cross-Sectional Studies; D004032:Diet; D005260:Female; D005492:Folic Acid / Q000008:administration & dosage / Q000652:urine; D006801:Humans; D007564:Japan; D009525:Niacin / Q000008:administration & dosage / Q000652:urine; D010205:Pantothenic Acid / Q000008:administration & dosage / Q000652:urine; D012256:Riboflavin / Q000008:administration & dosage / Q000652:urine; D013831:Thiamine / Q000008:administration & dosage / Q000652:urine; D014805:Vitamin B 12 / Q000008:administration & dosage / Q000652:urine; D025101:Vitamin B 6 / Q000008:administration & dosage / Q000652:urine; D014803:Vitamin B Complex / Q000008:administration & dosage* / Q000652:urine*
chemical_list: D014803:Vitamin B Complex; D010205:Pantothenic Acid; D009525:Niacin; D025101:Vitamin B 6; D005492:Folic Acid; D014805:Vitamin B 12; D001205:Ascorbic Acid; D012256:Riboflavin; D013831:Thiamine