Impact of processing on the bioavailability and vascular effects of blueberry (poly)phenols

Rodriguez-Mateos, Ana, Pino-García, Raquel Del, George, Trevor, Vidal-Diez, Alberto, Heiss, Christian and Spencer, Jeremy (2014) Impact of processing on the bioavailability and vascular effects of blueberry (poly)phenols. Molecular Nutrition & Food Research, 58 (10). pp. 1952-1961. ISSN 16134125

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Scope: Blueberries are a rich source of flavonoids and phenolic acids. Currently, little information is available regarding the impact of processing on the bioavailability and the bioactivity of blueberry (poly)phenols.

Methods and results: In a randomized, controlled crossover trial, ten healthy volunteers consumed (a) blueberry-containing baked products, (b) an unprocessed blueberry drink containing the same amount of freeze-dried blueberry powder as used in the baked products, and (c) matched control baked products. Endothelial function was measured as flow-mediated dilation (FMD) and plasma samples taken at baseline and at 1, 2, 4, and 6 h postconsumption. Although processing did not significantly change the total (poly) phenolic amount, the processed products contained significantly less anthocyanins (-42%), more chlorogenic acid (23%), no flavanol nonamers or decamers, and significantly more flavanol dimers and trimers (36% and 28%, respectively). FMD increased after 1, 2, and 6 h consumption of the baked products to a similar degree as the unprocessed blueberries, despite significant differences in the levels of individual plasma metabolites. No changes were observed after the consumption of the control product.

Conclusion: Careful processing can preserve important biological activities of blueberries despite changing the blueberry (poly) phenol composition and plasma metabolite profile.

Item Type: Article
Uncontrolled Keywords: Blueberry; Endothelial function; (Poly)phenols; Processing; Vascular function
Subjects: B400 Nutrition
D600 Food and Beverage studies
Department: Faculties > Health and Life Sciences > Applied Sciences
Depositing User: Paul Burns
Date Deposited: 06 Nov 2014 10:12
Last Modified: 12 Oct 2019 18:29

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