The ability of oats to delay glucose absorption, and therefore reduce the postprandial glycaemic response, provides a theoretical basis for their use as part of an overall treatment protocol in diabetes and hypoglycaemic conditions. A RCT of 12 patients with type 2 diabetes demonstrated that 30 g oat bran flour, high in beta-glucan, had a low glycaemic response and decreased the postprandial glycaemic response of an oral glucose load in a series of 2-hour meal glucose tolerance tests (Tapola et al 2005).
A RCT has shown that in a 50 g portion of carbohydrate, each gram of beta-glucan reduces the Gl by 4 units, making it a useful adjunct to reduce the postprandial glycaemic response without affecting palatability (Jenkins et al 2002). Another trial showed a 1 5.03 mg/dl_ drop in plasma glucose levels versus controls when consuming wholegrain oat-based cereals (Pins et al 2002).
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