GG decreases in vitro digestive lipolysis and carotenoid bioaccessibility from a pre-formed protein-stabilized emulsion. (January 2017)

• Record Type: Journal Article
• Authors: Amyoony, Jamal; Lin, Xinjie; Wright, Amanda Joyce
• Is Part Of: Bioactive carbohydrates and dietary fibre. Volume 9(2017)
• Page Start: 21
• Page End: 27
• Publication Date: 2017-01
• Subjects: BA bile acid(s) -- BC beta-carotene -- BS bile salt(s) -- CE cellulose -- DF dietary fibre -- D4, 3, volume weighted/mass moment mean -- D3, 2, surface weighted mean -- FA fatty acid(s) -- FFA free fatty acid(s) -- FF functional food(s) -- GG guar gum -- GIT gastrointestinal tract -- PTL pancreatic triglyceride lipase -- SBF simulated bile fluid -- SDF simulated duodenal fluid -- SEM standard error of the mean -- SGF simulated gastric fluid -- TAG triacylglycerol(s); Bioaccessibility -- Beta-carotene -- Emulsion -- Guar gum -- In vitro Lipolysis -- Viscosity; Functional foods -- Periodicals; Fiber in human nutrition -- Periodicals; Carbohydrates -- Periodicals; Glycoproteins -- Periodicals; Functional Food -- Periodicals; Dietary Fiber -- Periodicals; Carbohydrates -- Periodicals; Carbohydrates; Fiber in human nutrition; Functional foods; Glycoproteins; Periodicals; 613.28
• DOI: 10.1016/j.bcdf.2016.12.003
• Languages: English
• ISSNs: 2212-6198

Abstract

Abstract: Guar gum (GG) is a viscosity-inducing soluble dietary fibre used to thicken and stabilize foods and which may impact nutrient digestion and absorption. This research was undertaken to investigate the impact of GG (0.0 1.0, 1.5, 2.0, or 4.0% (w/v)) on lipid digestibility using an in vitro model of upper gastrointestinal digestion. Canola oil-in-water emulsions containing 0.1% beta-carotene (BC) were prepared and free fatty acid release and BC bioaccessibility under simulated duodenal conditions determined. The presence of GG increased digestate viscosity and the highest concentration investigated was associated with attenuated lipolysis and BC bioaccessibility. There were no differences in particle size or zeta-potential to suggest interfacial activity and minimal differences observed in digestate aqueous phase bile acid concentration. The results point to viscosity mechanisms as a major contributor to the effects observed and were supported by findings with the insoluble fibre cellulose and bile acid sequesterant cholestyramine. These findings offer insights into the impacts of GG on lipid digestion, with implications for the development of functional foods. Graphical abstract: Highlights: In vitro digestion of a protein-stabilized oil-in-water emulsion was studied. Guar gum reduced TAG lipolysis and beta carotene bioaccessibility. Effects were related to digestate viscosity and bile acid interactions.