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Trick or treat, is the super food boost (beetroot juice, spinach powder) best for nitrates supplementation? Which measure should we trust?

Shah, Iltaf, Naughton, Declan and Petroczi, Andrea (2013) Trick or treat, is the super food boost (beetroot juice, spinach powder) best for nitrates supplementation? Which measure should we trust? In: Analytica Acta-4th International Conference and Exhibition on Analytical and Bioanalytical Techniques; Oct 15-17 2013, Las Vegas, U.S.. (Unpublished)

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Abstract

The primary aim of this study was to evaluate and compare the efficacy and suitability of the use of beetroot juices against nitrate rich spinach powder in supplementation studies. To carry out the analysis of nitrates and nitrites, a new extraction method followed by ion chromatography method was developed and validated. The developed method showed higher efficiency and better recovery. On one hand, the results from beetroot juices showed that the levels of nitrate were not only different from what was shown on the labels but the amounts were deteriorating over time when the contents of the bottles were left unconsumed after opening or when tested under stomach pH conditions. On other hand, the measured levels of nitrate and nitrite in spinach powder were found to be constant over time and under stomach pH conditions with minimal deterioration. This challenges the authenticity of the data produced by the use of beetroot juice drinks in supplementation studies. This study further concluded that powdered forms (including spinach) are a better option as compared to juices, for two reasons: 1) the level can be measured in the aggregated sample (1kg) so it is easier than measuring each bottle; and 2) for spinach powder, it is easier to design a placebo control study, although lately beetroot juices are available from the companies without nitrite for this purpose but the supply is limited to selected research groups.

Item Type: Conference or Workshop Item (Lecture)
Event Title: Analytica Acta-4th International Conference and Exhibition on Analytical and Bioanalytical Techniques
Organising Body: OMICS Group
Additional Information: The absract of this paper can be found in Journal of Analytical & Bioanalytical Techniques.
Research Area: Biological sciences
Chemistry
Pre-clinical and human biological sciences
Faculty, School or Research Centre: Faculty of Science, Engineering and Computing > School of Life Sciences
Related URLs:
Depositing User: Iltaf Shah
Date Deposited: 06 Nov 2013 16:10
Last Modified: 06 Dec 2013 16:50
URI: http://eprints.kingston.ac.uk/id/eprint/26782

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