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Diabetes Care, Vol 19, Issue 8 831-834, Copyright © 1996 by American Diabetes Association
Effects of breakfast cereals containing various amounts of beta-glucan fibers on plasma glucose and insulin responses in NIDDM subjects
L Tappy, E Gugolz and P Wursch
Polyclinique Medicale Universitaire, Lausanne, Switzerland.
OBJECTIVE: To determine whether increasing doses (amounts) of beta-glucan
present in an extruded breakfast cereal affect the glycemic and insulinemic
responses in eight NIDDM subjects, compared with the same responses after a
continental breakfast (bread, milk, cheese, ham). RESEARCH DESIGN AND
METHODS: Breakfast cereals were produced using various proportions of oat
bran enriched in fiber, which contain an unusually high amount of a viscous
polysaccharide, called beta-glucan, and oat bran. The carbohydrate load was
35 g. RESULTS: The maximum increases observed in plasma glucose after the
breakfast cereal were 67% (P < 0.05), 42% (P < 0.001), and 38% (P
< 0.001) with 4.0, 6.0, and 8.4 g beta-glucan, respectively, compared
with the continental breakfast. There was a linear inverse relationship
between dose of beta-glucan and plasma glucose peak or area under the
glucose curve (R2 = 0.94, P < 0.05). Postprandial insulin increase was
only 59-67% (P < 0.01) as high as the continental breakfast after all
three levels of beta-glucan. CONCLUSIONS: The 50% decrease in glycemic
response that was observed after the ingestion of 35 g carbohydrate is
estimated to occur with approximately 5 g beta-glucan. This dose of
beta-glucan can easily be attained without the loss of taste by
incorporating oat bran concentrate in products.

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Copyright © 1996 by the American Diabetes Association.
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