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Related Experiment Videos

Iron availability from whey protein hydrogels: an in vitro study.

Gabriel E Remondetto1, Erick Beyssac, Muriel Subirade

  • 1Chaire de recherche du Canada sur les protéines, les bio-systèmes et les aliments fonctionnels, Institut de recherche sur les nutraceutiques et les aliments fonctionnels (INAF/STELA), Université Laval, Pavillon Paul-Comtois, Québec, G1K 7P4, Canada.

Journal of Agricultural and Food Chemistry
|December 23, 2004
PubMed
Summary

Whey protein hydrogels with filamentous structures enhance iron delivery and absorption, particularly during simulated intestinal digestion. This suggests their potential for developing iron-fortified functional foods.

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Area of Science:

  • Food Science
  • Biomaterials Science
  • Nutritional Science

Background:

  • Whey protein hydrogels are explored for nutrient delivery.
  • Hydrogel microstructure (filamentous vs. particulate) may impact iron release.
  • Understanding iron release under physiological conditions is crucial for bioavailability.

Purpose of the Study:

  • To investigate the influence of whey protein hydrogel microstructure on iron delivery.
  • To evaluate iron release and absorption under simulated gastrointestinal conditions.
  • To assess the potential of filamentous gels for iron fortification in functional foods.

Main Methods:

  • Preparation and characterization of filamentous and particulate whey protein hydrogels.
  • In vitro studies on iron release at varying pH and in the presence of digestive enzymes (pepsin, pancreatin).

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  • Simulated gastrointestinal digestion and iron absorption assessment using Caco-2 cell models.

    • Main Results:

    • Iron release profiles differed significantly between filamentous and particulate gels based on pH.
    • Filamentous gels demonstrated increased iron release upon enzymatic treatment, unlike particulate gels.
    • Filamentous gels protected iron during simulated gastric transit and enhanced intracellular iron absorption in Caco-2 cells.

    Conclusions:

    • Whey protein hydrogel microstructure critically influences iron delivery and release kinetics.
    • Filamentous hydrogels show superior performance in protecting iron during gastric digestion and promoting intestinal absorption.
    • Filamentous whey protein hydrogels represent a promising matrix for iron fortification in functional food development.