Nutrition Discussion Forum
- 1 January 1997
- journal article
- Published by Cambridge University Press (CUP) in British Journal of Nutrition
- Vol. 77 (1), 141-148
- https://doi.org/10.1079/bjn19970016
Abstract
In work aimed at developing methodologies for validation of estimates of the dietary intake of free-living individuals, Bingham and colleagues have examined the use of urinary nitrogen (UN) excretion as an index of protein intake (Bingham & Cummings, 1985; Bingham, 1994; Bingham et al. 1995). The basis of this approach is that in subjects in N equilibrium, N intake is assumed equal to N excretion. Thus, if N excretion is measured it should indicate N and dietary protein intakes. In practice, since most N excretion occurs via the urine, which is relatively simple to collect, Bingham and colleagues examined the relationship between 24 h UN and N intake (DN). They argued that in subjects on typical UK diets UN should bear a fixed relationship to DN, and measured it carefully in a group of subjects. They showed that in a group of eight individuals in which intake and N excretion were measured meticulously, UN was 81% DN (SD 2, range 78–83%). They argued that measurement of this ratio could be used to assess the validity of food intake measurement and concluded ‘In healthy individuals eating normal western diets, 24 h urine N from an 8 day collection verified for its completeness by the PABA check method, should establish urine N to within 81(SD 5)% of the habitual dietary intake, range 70–90%. If the dietary assessment from 18 days of records or 24 h recalls or the diet history falls within these limits, it can be stated that there is no evidence of interference with normal dietary habits, or of reporting errors….’ (Bingham & Cummings, 1985).Keywords
This publication has 19 references indexed in Scilit:
- Another Source of Error in the Metabolic Balance MethodNutrition Reviews, 2009
- Does increased endogenous formation of N-nitroso compounds in the human colon explain the association between red meat and colon cancer?Carcinogenesis: Integrative Cancer Research, 1996
- Validation of weighed records and other methods of dietary assessment using the 24 h urine nitrogen technique and other biological markersBritish Journal of Nutrition, 1995
- The use of 24-h urine samples and energy expenditure to validate dietary assessmentsThe American Journal of Clinical Nutrition, 1994
- Protein intakes in the adult population of the UKInternational Journal of Food Sciences and Nutrition, 1993
- Endogenous N-nitrosation in man assessed by measurement of apparent total N-nitroso compounds in faecesCarcinogenesis: Integrative Cancer Research, 1991
- Human Amino Acid and Protein Requirements: Current Dilemmas and UncertaintiesNutrition Research Reviews, 1989
- Urine nitrogen as an independent validatory measure of dietary intake: a study of nitrogen balance in individuals consuming their normal dietThe American Journal of Clinical Nutrition, 1985
- The Use of 4-Aminobenzoic Acid as a Marker to Validate the Completeness of 24 H Urine Collections in ManClinical Science, 1983
- Balance StudiesJournal of Nutrition, 1976