title: In vitro starch hydrolysis and estimated glycemic index of tef porridge and injera.
abstract: The aim of this study was to investigate the in vitro starch digestibility of injera and porridge from seven tef varieties and to estimate their glycemic index. The total starch, free glucose, apparent amylose, resistant, slowly digestible and rapidly digestible starches of the varieties ranged between 66 and 76, 1.8 and 2.4g/100g flour dry matter (DM), 29 and 31%, 17 and 68, 19 and 53, 12 and 30g/100g starch DM, respectively. After processing into injera and porridge, the rapidly digestible starch content increased by 60-85% and 3-69%, respectively. The estimated glycemic index of porridge and injera of the varieties ranged 79-99 and 94-137 when estimated based on model of Goni et al. (1997) whereas from 69 to 100 and 94 to 161, respectively based on Granfeldtet al. (1992). Tef porridge and injera samples studied here can be classified as medium- high GI foods, not to be considered as a proper food ingredient for diabetic people and patients in weight gain control.
authors.affiliation: Research Group Food Microbiology and Biotechnology, Department of Industrial Biological Sciences, Faculty of Bioscience Engineering, Ghent University, Campus Kortrijk, Graaf Karel de Goedelaan 5, 8500 Kortrijk, Belgium. Electronic address: habtu.shumoy@ugent.be.
authors.forename: Habtu
authors.initials: H
authors.lastname: Shumoy
authors.affiliation: Research Group Food Microbiology and Biotechnology, Department of Industrial Biological Sciences, Faculty of Bioscience Engineering, Ghent University, Campus Kortrijk, Graaf Karel de Goedelaan 5, 8500 Kortrijk, Belgium. Electronic address: katleen.raes@ugent.be.
authors.forename: Katleen
authors.initials: K
authors.lastname: Raes
mesh_terms: D005002:Ethiopia; D005433:Flour / Q000032:analysis*; D005504:Food Analysis / Q000379:methods*; D038321:Glycemic Index / Q000502:physiology*; D006801:Humans; D006868:Hydrolysis; D013213:Starch / Q000737:chemistry*
chemical_list: D013213:Starch
keywords: Glycemic index; Hydrolysis index; Injera; Porridge; Starch; Tef