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Lookup NU author(s): Professor John Mathers
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Lack of accurate dietary assessment in free-living populations requires discovery of new biomarkers reflecting food intake qualitatively and quantitatively to objectively evaluate effects of diet on health. We provide a proof-of-principle for an analytical pipeline to identify quantitative dietary biomarkers. Tartaric acid was identified by nuclear magnetic resonance spectroscopy as a dose-responsive urinary biomarker of grape intake and subsequently quantified in volunteers following a series of 4-day dietary interventions incorporating 0 g/day, SO g/day, 100 g/day, and 150 g/day of grapes in standardized diets from a randomized controlled clinical trial. Most accurate quantitative predictions of grape intake were obtained in 24 h urine samples which have the strongest linear relationship between grape intake and tartaric acid excretion (r(2) = 0.90). This new methodological pipeline for estimating nutritional intake based on coupling dietary intake information and quantified nutritional biomarkers was developed and validated in a controlled dietary intervention study, showing that this approach can improve the accuracy Of estimating nutritional intakes.
Author(s): Garcia-Perez I, Posma JM, Chambers ES, Nicholson JK, Mathers JC, Beckmann M, Draper J, Holmes E, Frost G
Publication type: Article
Publication status: Published
Journal: Journal of Agricultural and Food Chemistry
Print publication date: 23/03/2016
Online publication date: 24/02/2016
Acceptance date: 24/02/2016
ISSN (print): 0021-8561
ISSN (electronic): 1520-5118
Publisher: American Chemical Society
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