NDLI: The potential for a carbon stable isotope biomarker of dietary sugar intake

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The potential for a carbon stable isotope biomarker of dietary sugar intake

Content Provider	Royal Society of Chemistry (RSC)
Author	Jahren, A. Hope Bostic, Joshua N. Davy, Brenda M.
Copyright Year	2014
Abstract	Added sugar is sweetener added to foods during processing or preparation that offers no health benefits to the consumer. The mean U.S. intake of added sugar is ≈16% of total calories; at the highest level of consumption, this value exceeds 35%. In addition, 78% of added sugar typically consumed is refined from C4 plants (e.g., corn and sugar cane) and it follows that the δ13C value of these sweeteners is conspicuously high compared to carbohydrates derived from C3 plants. We first suggested in 2006 the potential for the δ13C of human tissues to indicate corn- and cane-sugar intake for use in a clinical setting. At present, self-reported dietary assessment methods are commonly used to measure added sugar intake, but are subject to underreporting, particularly for sugar-rich foods. If a carbon isotope technique could produce a quantitative indicator of dietary sugar intake, it would be invaluable to the prevention and clinical treatment of chronic diseases associated with excess sugar consumption. Research to date has focused upon testing the correlation between diet as characterized either by bulk food δ13C value or by food composition (e.g., added sugar intake quartile) and the δ13C values of human tissues. Analysis of hair, nail and red blood cells in modern humans with known diet has revealed associations between the δ13C value of bulk diet and the δ13C value of these tissues. With respect to added sugar, the δ13C values of blood serum and fingerstick blood have both been shown to be associated with added sugar intake, even after adjustment for meat intake. Researchers have attempted to isolate specific compounds in blood that are uniquely derived from dietary carbohydrates, such as direct endogenous carbohydrate sources (blood glucose) and specific non-essential amino acids (red blood cell alanine), and have seen strong correlations with added sugar intake. Recognized dietary confounders such as meat/animal products have been addressed using statistical adjustments and a dual-isotope analytical approach that invokes δ15N as a correction factor. Further controlled feeding studies and epidemiological surveys complete with Institutional Review Board approval are needed to establish the sensitivity of δ13C tissue assay as an objective biomarker for added sugar intake.
Starting Page	795
Ending Page	816
Page Count	22
File Format	HTM / HTML PDF
ISSN	02679477
Volume Number	29
Issue Number	5
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/c3ja50339a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Institutional Review Board Carbohydrate C4 carbon fixation Maize Sugarcane Δ13C C3 carbon fixation Carbon Isotopes of carbon Blood plasma Glucose Red blood cell Alanine Δ15N Institutional review board Biomarker
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

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