Plant Foods for Human Nutrition

, Volume 42, Issue 2, pp 135–142 | Cite as

Commercial soybean starch blocker consumption: Impact on weight gain and on copper, lead and zinc status of rats

  • J. Umoren
  • C. Kies


A commercial ‘starch blocker’ was used to study the digestin of starch (potato) in mature female rates for four weeks. Two levels of ‘starch blocker’ were used. The first level was calculated to inhibit starch digestion at 50%, the second was calculated to inhibit starch digestion at 100%. No significant effects on the body weights (271.10±29, 277.7±43, 259.1±25 g) were found among the groups of rats at 0%, 50% and 100% inhibition levels, respectively. Feed intakes were not affected. However, fecal copper and zinc excretions increased significantly (p<0.05) due to the inhibitors. Fecal copper excretions were 0.468±0.14, 0.578±0.09, 0.617±0.07 mg/rat/week, while fecal zinc values were 0.625±0.14, 0.859±0.32 and 0.778±0.26 mg/rat/week when no inhibitor was fed, at 50% inhibition and at 100% inhibition respectively. Thus, while use of ‘starch blockers’ did not promote weight loss in the mature female rats, utilization of copper and zinc were negatively affected.

Key words

Copper lead zinc starch blockers a-amylase inhibitors 


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Copyright information

© Kluwer Academic Publishers 1992

Authors and Affiliations

  • J. Umoren
    • 1
  • C. Kies
    • 2
  1. 1.Northern Illinois UniversityDe KalbUSA
  2. 2.University of NebraskaLincolnUSA

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