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Related Experiment Videos

Resistant starch as energy

K M Behall1, J C Howe

  • 1Diet and Human Performance Laboratory, Agricultural Research Service, US Department of Agriculture, Beltsville, Maryland 20705-2350, USA.

Journal of the American College of Nutrition
|June 1, 1996
PubMed
Summary
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High amylose starch did not significantly alter metabolizable energy (ME) in men. However, resistant starch from amylose appears to be an energy source, with hyperinsulinemic individuals utilizing it less effectively.

Area of Science:

  • Nutrition Science
  • Human Metabolism
  • Dietary Carbohydrates

Background:

  • Resistant starch, a component of certain starches, resists digestion in the small intestine.
  • Understanding the metabolizable energy (ME) of different starch types is crucial for dietary recommendations.
  • High amylose cornstarch is a source of resistant starch.

Purpose of the Study:

  • To compare the metabolizable energy (ME) of standard cornstarch versus high amylose cornstarch.
  • To evaluate starch utilization and energy absorption in control and hyperinsulinemic men.

Main Methods:

  • Diets with 70% amylose (AM) or 70% amylopectin (AP) cornstarch were fed to 24 men for 14 weeks.
  • Energy, nitrogen, fiber, and starch content of food, urine, and feces were analyzed.

Related Experiment Videos

  • Metabolizable energy (ME) was calculated as energy intake minus fecal and urinary energy excretion.

    • Main Results:

    • High amylose diets contained significantly more resistant starch (29.7g) than amylopectin diets (0.8g).
    • No significant difference in ME was observed between AM and AP diets or between subject groups.
    • Hyperinsulinemic subjects showed lower resistant starch digestibility (53.2%) compared to controls (81.8%).

    Conclusions:

    • Dietary starch type did not significantly impact overall metabolizable energy.
    • Resistant starch from high amylose cornstarch is utilized as an energy source.
    • Hyperinsulinemic men demonstrated reduced capacity to utilize resistant starch for energy.