Acute effect of oat β-glucan on the bioavailability of orange juice flavanones

Abstract

The impact of β-glucan on the bioavailability of orange juice (OJ) flavanones was investigated in a randomised controlled trial. Volunteers consumed 500 mL of OJ without or with either 3 g (OB-3) or 6 g (OB-6) of β-glucan. Urine samples, collected 12 h before and over a 0–24 h period post-supplementation, were analysed by high-performance liquid chromatography-high resolution mass spectrometry. The overall 0–24 h urinary excretion of the 17 flavanone metabolites identified and quantified in urine after OJ ingestion corresponded to 29.7 µmol, and 25.0 and 9.3 µmol, respectively, after OB-3 and OB-6 intake. This corresponds to 9.3, 7.9, and 2.9% recoveries of the 318 µmol of the ingested flavanones. The acute ingestion of OJ with 6 g, but not 3 g of β-glucan led to a significant reduction (p < 0.05) in the excretion of flavanone metabolites compared with consumption of OJ alone.

Graphical Abstract

Keywords:

• OJ flavanones
• bioavailability
• UHPLC-HR-MS analysis
• oat β-glucan
• flavanone metabolites

Acknowledgements

Our thanks to the volunteers who participated in the study.

Disclosure statement

No potential conflict of interest was reported by the authors.

Data availability statement

The data that support the findings of this study are available from the corresponding author [A.L.G.], upon reasonable request.

Additional information

Funding

T.M.A., A.C., and G.P.-C. are grateful for support by the Distinguished Scientist Fellowship Program (DSFP) at King Saud University, Riyadh, Saudi Arabia. G.P.-C. was also supported by a post-doctoral research contract “Juan de la Cierva-Incorporación” funded by the Spanish Ministry of Economy and Competitiveness (FJCI-2015-26433). This study was also part funded by the Andalusian Institute of Agricultural and Fisheries Research and Training (IFAPA) and the European Rural Development Fund (ERDF, EU) through the project “Caracterización, biodisponibilidad y potencial saludable de compuestos bioactivos de alimentos” (PP.AVA.AVA2019.037). G.M.-S. is grateful to SENESCYT and the Ecuadorian Government for funding her post-graduate studies at the University of Glasgow.