Cited by 79Food and Agricultural SciencesMuscle metabolism and nutritionFood composition and properties

True ileal digestibility of legumes determined by dual-isotope tracer method in Indian adults

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Kashyap, Sindhu, Varkey, Aneesia, Shivakumar, Nirupama, Devi, Sarita, Reddy B H, Rajashekar, Thomas, Tinku, Preston, Thomas, Sreeman, Sheshshayee +1 more·2019·The American Journal of Clinical Nutrition

Abstract

BACKGROUND: Good-quality plant protein sources are important for protein adequacy in a balanced diet. Legumes are known to be a source of good quality plant protein, but the true ileal digestibility of indispensable amino acids (IAAs) of commonly consumed legumes is not known in humans. OBJECTIVES: In this study we measured the true ileal IAA digestibility of 2H-intrinsically labeled chickpea, yellow pea, and mung bean (hulled and dehulled) protein, using the dual-isotope tracer technique referenced to a standard protein ([U-13C] spirulina). The study also aimed to validate the use of [U-13C] spirulina as a reference protein in this method. METHODS: 2H-intrinsically labeled legumes, obtained by watering plants with deuterium oxide (2H2O), were administered in a plateau feeding method to healthy Indian adults to measure their true ileal IAA digestibility with the dual-isotope tracer technique, using [U-13C] spirulina protein or a 13C-algal IAA mixture as the standard. RESULT: The true ileal IAA digestibilities (mean ± SD) of chickpea, yellow pea, and mung bean were 74.6 ± 0.8%, 71.6 ± 1.3%, and 63.2 ± 1.5%, respectively. The true mean ileal IAA digestibility of mung bean when referenced to [U-13C] spirulina protein or a 13C-algal IAA mixture did not differ significantly (63.2 ± 1.5% versus 64.0 ± 2.4%, P > 0.05). The true ileal IAA digestibility of mung bean improved to 70.9 ± 2.1% after dehulling. CONCLUSIONS: The true mean ileal IAA digestibility of legumes in healthy Indian adults was lower than expected. Traditional processing techniques such as dehulling improve protein digestibility by about 8%. This study was registered in the Clinical Trials Registry of India (CTRI): CTRI/2017/11/010468 (http://ctri.nic.in, accessed on 28/03/2019).

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  • The presence of nonprotein constituents and antinutritional factors are thought to slow and reduce the digestion and absorption of protein, meaning that a lower proportion of ingested amino acids become available at a reduced rate in the circulation postprandially.

    “The presence of nonprotein constituents and antinutritional factors are thought to slow (and reduce) the digestion and absorption of protein, meaning that a lower proportion of ingested amino acids become available (at a reduced rate) in the circulation postprandially [78,79].”

    From Nutritional Considerations for the Vegan Athlete (2023) · cites this paper as [79]

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Authors
Kashyap, S., Varkey, A., Shivakumar, N., Devi, S., Reddy B H, R., Thomas, T., Preston, T., Sreeman, S., & Kurpad, A. V.
Affiliations
  • St. John's National Academy of Health Sciences (IN)
  • University of Agricultural Sciences, Bangalore (IN)
Corresponding author
Kurpad, Anura V
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2019-10
Volume
110
Issue
4
Pages
873-882
ISSN
0002-9165 (ISSN-L)
OpenAlex
W2969716981
Cited by
79
References
38
Citations by year
2026: 7 · 2025: 18 · 2024: 13 · 2023: 8 · 2022: 7 · 2021: 16 · 2020: 10
FWCI
6.36
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (acceptedVersion, cc-by-sa)
Funders
University of Glasgow
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Nursing › Nutrition and Dietetics › Food composition and properties
Keywords
true ileal digestibility, Fabaceae, essential amino acids, chickpea, yellow pea, mungbean, dehulling, protein digestibility, reference proteins, plant proteins, Indian adults
MeSH terms
Adult, Carbon, Carbon Isotopes, Deuterium, Digestion, Female, Humans, Ileum, Fabaceae, Male, Oxidation-Reduction, Water, Young Adult

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