Division of Endocrinology and Metabolism, Ottawa Civic Hospital, University of Ottawa, Ontario, Canada.
The aim of the current study was to characterize the effects of isolated and native sources of beta-glucan, oat gum, and oatbran, respectively, when incorporated into a complete meal. Fasting control subjects and subjects with Type 2 diabetes were fed porridge meals containing either wheat farina, wheat farina plus oat gum or oatbran. Blood samples were collected for 3 h after the test meals and plasma glucose and insulin were measured. Oatbran and wheat farina plus oat gum meals reduced the postprandial plasma glucose excursions and insulin levels when compared with the control wheat farina meal in both control and Type 2 diabetic subjects. This study shows that both the native cell wall fibre of oatbran and isolated oat gum, when incorporated into a meal, act similarly by lowering postprandial plasma glucose and insulin levels. A diet rich in beta-glucan may therefore be of benefit in the regulation of postprandial plasma glucose levels in subjects with Type 2 diabetes.
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