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Sorghum Starch and Protein Digestibility: Mechanisms, Modifications, and Health Implications.
Douglas Olson1, Anbuhkani Muniandy2, Lijia Zhu2
1USDA-ARS-SRRC Food Processing and Sensory Quality, 1100 Allen Toussaint Blvd, New Orleans, LA 70124, USA.
Foods (Basel, Switzerland)
|May 27, 2026
Summary
Sorghum
Area of Science:
- Food Science and Nutrition
- Molecular Gastronomy
- Clinical Nutrition
Background:
- Sorghum's complex molecular structure, particularly protein-starch interactions, affects its digestibility.
- Heat processing and inherent enzyme inhibitors reduce sorghum's starch digestibility.
- Reduced digestibility has implications for both malnutrition and metabolic health.
Purpose of the Study:
- To review sorghum's digestibility from molecular to clinical levels.
- To explore how processing impacts sorghum's nutritional and health benefits.
- To identify strategies for optimizing sorghum's digestibility and health outcomes.
Main Methods:
- Literature review focusing on molecular composition, processing techniques, and health impacts.
- Analysis of protein-starch interactions and their effect on enzymatic hydrolysis.
- Evaluation of emerging technologies for modulating sorghum properties.
Main Results:
- Cooked sorghum exhibits lower digestibility due to heat-induced cross-linking and kafirin disulfide bonds.
- Enzyme inhibitors further impede starch hydrolysis, impacting nutrient availability.
- Reduced digestibility can lower postprandial glucose but may affect malnourished individuals.
Conclusions:
- Processing methods can enhance sorghum digestibility while preserving bioactive compounds.
- Optimizing digestibility balances nutrient bioavailability with metabolic advantages.
- Tailoring sorghum processing can benefit diverse populations, from the malnourished to those with diabetes.
Keywords:
digestibilityfood processingfunctional foodsprotein-starch interactionsresistant starchsorghumMore Related Videos
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