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CompletedNCT04872530Updated Nov 30, 2023

Bioavailability of Plant Protein Amino Acids

An interventional study of Pea-protein concentrate and Fava-bean protein concentrate in Bioavailability of Amino Acids Following Oral Ingestion of Plant-Based Proteins in Young, Healthy Men, sponsored by University of Limerick. Completed at 1 site in Ireland. Open to male participants aged 18 Years to 35 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-11-30.

Sponsored by University of Limerick · Not applicable, Interventional, and Other

From the registry’s dates

  • Registered 1 year 3 months after the study started (first participant enrolled Jan 2020, registered Apr 2021).
Phase
Not applicable
Study type
Interventional
Enrollment
10
Allocation
Randomized
Ages
18 Years to 35 Years
Sex
Male
01

Study summary

This study aims to inform of the mechanism of action of plant-based protein by measuring the bioavailability (i.e. rate of appearance and magnitude of concentration in the circulation following oral ingestion) of key amino acid and metabolic products that regulate skeletal muscle protein synthesis (MPS) in humans.

Read the detailed description

Plant-based proteins contain several amino acids that are essential to signal muscle growth/repair and act as a substrate during muscle protein synthesis. However, compared to animal protein or free-amino acids, the bioavailability of certain essential amino acids may be compromised. Following selective processing (e.g. removal of carbohydrate and/or other anti-nutritive factors) food grade plant-based protein concentrates possibly confer greater bioavailability and bioactivity in vivo. This project explores the bioavailability and bioactivity of selected plant-based protein concentrates following oral ingestion in young, healthy men and women.

02

Conditions studied

  • Bioavailability of Amino Acids Following Oral Ingestion of Plant-Based Proteins in Young, Healthy Men

Keywords

  • Bioavailability of Amino Acids Following Oral Ingestion of Plant-Based Proteins in Young, Healthy Men
03

In context

Lead sponsor

University of Limerick is the lead sponsor of 56 studies on the registry; 9 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 35 Years
Sexes eligible
Male
Accepts healthy volunteers
Yes

Inclusion criteria

  • No known intolerance to any item contained in the protein products.
  • No blood borne disease risk, current illness or medication that would adversely affect participation
  • No known adverse reaction to venepuncture

Exclusion criteria

Exclusion Criteria:

  • n/a
05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Single (Participant)
Enrollment
10 participants (actual)

Study arms

  • Experimental
    Pea-protein concentrate

    Pea-protein concentrate dosed at 0.33 g/kg body mass in 500 ml of water.

    Dietary Supplement: Pea-protein concentrate

  • Experimental
    Fava-bean protein concentrate

    Fava-bean protein concentrate dosed at 0.33 g/kg body mass in 500 ml of water.

    Dietary Supplement: Fava-bean protein concentrate

  • Experimental
    Chickpea protein concentrate

    Chickpea protein concentrate dosed at 0.33 g/kg body mass in 500 ml of water.

    Dietary Supplement: Chickpea protein concentrate

  • Experimental
    Red lentil protein concentrate

    Red lentil protein concentrate dosed at 0.33 g/kg body mass in 500 ml of water.

    Dietary Supplement: Red lentil protein concentrate

  • Experimental
    Non-essential amino acid blend

    Non-essential amino acid blend dosed at 0.33 g/kg body mass in 500 ml of water.

    Dietary Supplement: Non-essential amino acid blend

  • Experimental
    Whey protein concentrate

    Whey protein concentrate dosed at 0.33 g/kg body mass in 500 ml of water.

    Dietary Supplement: Whey protein concentrate

Interventions

  • Dietary supplementPea-protein concentrate

    Pea-protein concentrate

  • Dietary supplementFava-bean protein concentrate

    Fava-bean protein concentrate

  • Dietary supplementChickpea protein concentrate

    Chickpea protein concentrate

  • Dietary supplementRed lentil protein concentrate

    Red lentil protein concentrate

  • Dietary supplementNon-essential amino acid blend

    Non-essential amino acid blend

  • Dietary supplementWhey protein concentrate

    Whey protein concentrate

06

What researchers measure

Primary outcomes

  1. Plasma amino acids

    Plasma amino acids measured by HPLC

    Time frame: 3 hours

07

Study locations

1 site
  • Education and Health Sciences
    Limerick, V94 T9PX, Ireland
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 30, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT04872530
Lead sponsor
University of Limerick
Collaborators
Marigot Ltd., Enterprise Ireland
Responsible party
Sponsor
First posted
May 4, 2021
Start date
Jan 8, 2020
Primary completion
May 31, 2021
Completion
Sep 29, 2023
Last update
Nov 30, 2023

Study contacts

Phil Jakeman, PhD
principal investigator · University of Limerick

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2023. You cannot join it, but the record below documents what was studied.

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