Effects of selected antioxidant food extracts on postprandial glucose responses in healthy individuals
DOI:
https://doi.org/10.31989/ffhd.v6i8.271Abstract
Background: Obesity and diabetes are highly prevalent in Western countries, and both conditions can be associated with impaired glucose control and hyperglycemia. Antioxidants have been identified as having the ability to regulate blood glucose levels, however, the effects of specific high-antioxidant food extracts on blood glucose levels have not been well characterized. This study aimed to measure the hypoglycemic effects of selected antioxidant food extracts in healthy individuals.
Methods: Ten healthy individuals were recruited into a randomized, single-blinded study. Participants consumed five different high-antioxidant food extracts (one per session, each >48 hours apart) that were matched for total antioxidant content 10 mins prior to ingestion of 50 g of available carbohydrate from either glucose load or white bread (with ham) after an overnight fast. Blood glucose levels were measured using capillary sampling every 15 mins for two hours, and the incremental area under the glucose curve (IAUC) measured. The IAUC values for the test foods were compared to the glucose-only and bread-only controls.
Results: Amla berry-, Grape seed- Rooibos tea- and Green tea- extracts as well as Propolis tincture were all strong glycemic modulators, significantly decreasing the IAUC by 25-40% compared to the glucose-only or white bread controls (all p < 0.05).
Conclusions: Antioxidants are able to modulate postprandial glucose response in healthy subjects. These results suggest that further research is warranted to determine whether these antioxidant-rich foods are of benefit to people with prediabetes or type 2 diabetes mellitus.
Keywords: Antioxidants, glycemic response, blood glucose levelsDownloads
Published
Issue
Section
License
Any manuscripts or substantial parts of it, submitted to the journal must not be under consideration by or previously published in any other journal or citable form. Authors are required to ensure that no material submitted as part of a manuscript infringes existing copyrights or the rights of a third party. In submitting one's article in any form, the author has assigned the FFC publishing rights and has agreed to an automatic transfer of the copyright to the publisher. This is so that the FFC may create print option journals, for example, at the FFC’s discretion. If the author wishes to distribute their works by means outside of the FFC, for example within their community, they will have to place a request.
Correspondence concerning articles published in Functional Foods in Health and Disease is encouraged. While derivative works (adaptations, extensions on the current work, etc.) are allowed, distribution of the modified material is not allowed without permission from the FFC.