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A novel source of wheat fiber and protein: effects on fecal bulk and serum lipids^1,2,3

Background: Wheat fiber is a laxative and wheat protein may affect blood lipids.

Objective: We therefore tested the effects on laxation and serum lipid metabolism of a novel source of wheat fiber and protein produced by the amylolytic digestion of starch from wheat.

Design: Twenty-four healthy men and women consumed 3 different test cereals in random order, each for 2 wk. The test supplement and the positive control, American Association of Cereal Chemists wheat bran supplement, both provided the same amount of fiber (21 g/d) and the negative control supplement provided 1.7 g fiber/d.

Results: The test supplement and the positive control supplement increased fecal bulk similarly (239.5 ± 19 and 216.7 ± 19 g/d, respectively) and significantly more than did the negative control supplement (165.6 ± 16 g/d, P < 0.010). Compared with the negative and positive control supplements, the week 2 value of the test supplement for the ratio of total to HDL cholesterol was significantly reduced (P = 0.046).

Conclusion: We conclude that the product of amylolytic digestion of starch from wheat flakes, which is high in wheat fiber and protein, has a fecal bulking effect similar to that of wheat bran and may have a beneficial effect on serum lipids.

Key Words: Wheat bran • wheat protein • fecal bulk • transit time • blood lipids • amylolysis • humans

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