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  • Title: Effect of sourdough addition and storage time on in vitro starch digestibility and estimated glycemic index of tef bread.
    Author: Shumoy H, Van Bockstaele F, Devecioglu D, Raes K.
    Journal: Food Chem; 2018 Oct 30; 264():34-40. PubMed ID: 29853385.
    Abstract:
    The effect of sourdough amount and storage time on starch digestibility and estimated glycemic index (eGI) of tef bread was investigated. The rapidly digestible starch (RDS), slowly digestible starch (SDS) and resistant starch (RS) of 0-30% sourdough fresh tef breads ranged from 49 to 58, 16 to 29 and 20 to 26 g/100 g starch, respectively. Storage of tef breads up to 5 days decreased the RDS by more than 2-fold while SDS and RS increased by 2 and 3 fold, respectively. The eGI for fresh and stored breads ranged from 39 to 89. Addition of sourdough increased the eGI of fresh breads while no uniform pattern was seen in the stored breads. As the storage time increased, all the breads showed a decrease in eGI. In vivo study is necessary to further investigate the effect of sourdough on GI of tef bread.
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