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High-fiber Cereal Cuts Excess Insulin Production
posted 06/22/04
Dietary fiber can help to prevent hyperinsulinemia -- and
ward off diabetes.
People in danger of developing type 2 diabetes often have high
levels of insulin; because they are "insulin resistant," glucose is not
processed properly and the pancreas compensates by producing more insulin.
Dr. Thomas M. S. Wolever, of the University of Toronto, Canada, and colleagues
compared the effect of high-fiber cereal versus low-fiber cereal on glucose and
insulin in 77 non-diabetic men, of whom 35 had normal fasting insulin levels
while 42 had high levels.
Those with hyperinsulinemia were significantly heavier and had large waist
circumferences than the normal-insulin group. Hyperinsulinemic men also had
lower HDL ("good") cholesterol and a trend toward higher triglyceride levels.
The participants were studied on two occasions after 10- to 14-hour overnight
fasts. The two test cereals contained the same amount of carbohydrate but
different amounts of fiber.
In both groups of men, blood glucose levels rose less after they ate the
high-fiber cereal than after the low-fiber cereal, Wolever and colleagues
report.
Also, in the hyperinsulinemic men, the high-fiber intake reduced the rise in
peak insulin compared with that seen after the low fiber meal. In the normal
insulin men, the rise in insulin after eating was the same with both types of
cereal.
While the results suggest dietary fiber helps control insulin responses, the
team concludes that longer studies "are required before conclusions can be drawn
as to whether a high-fiber breakfast cereal has any long-term benefits for the
management of insulin resistance or obesity."
Source: Diabetes In Control.com: Diabetes Care, June 2004.
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