Diabetes, Vol 42, Issue 4 503-508, Copyright © 1993 by American Diabetes Association
Dietary fiber in the management of diabetes
FQ Nuttall
Section of Endocrinology, Metabolism and Nutrition, VA Medical Center, Minneapolis, MN 55417.
It generally is accepted that a diet high in fiber, particularly soluble
fiber, is useful in the management of the plasma glucose concentration in
individuals with diabetes. This is one of the reasons several national
diabetes associations have recommended that diabetic individuals ingest a
diet high in fiber-containing foods. However, more recent data obtained in
carefully controlled studies with more definitive end points, indicate this
may not be the case. It has been shown clearly that addition of
water-soluble, gel-forming fiber in the form of guar gum and perhaps gum
tragacanth to an ingested glucose solution or to a mixed meal will reduce
the expected rise in glucose concentration. This has been demonstrated in
both normal subjects and subjects with IDDM and NIDDM. However, it is only
observed when large amounts of fiber are added. The fiber also must be
mixed with the administered glucose or food. Other less viscous soluble
fiber sources such as the pectins and psyllium powder are not effective. In
long-term, well-controlled trials, guar gum, pectin, beet fiber, or cereal
bran fiber ingested with meals has been of little or no value in
controlling the plasma glucose concentration in individuals with NIDDM.
Several studies have been conducted in which a high-carbohydrate diet has
been reported to reduce the plasma glucose concentration. In these diets,
foods with a high fiber content have been emphasized. In general, they were
not well controlled, and several confounding variables such as weight loss,
decreased food energy intake, different food sources with potential for
differences in starch digestibility, and decreased dietary fat content were
present.(ABSTRACT TRUNCATED AT 250 WORDS)