The goal of this interventional study is to learn about the digestibility of different plant-based proteins in adults (age 18-75) with an ileostomy. The main questions the study aims to answer are: 1. How does the digestibility of proteins in the small intestine differ between different plant-based proteins? 2. Which proteins and amino acids are not digested or absorbed in the small intestine and are available for further metabolic processes in the large intestine? 3. How do metabolites in the collected content of the ileostomy bag differ after consuming different plant-based proteins? 4. Can the in vivo results be compared to results from existing in vitro models? Participants will consume five different protein meals (oat protein - high bioavailable, oat protein - low bioavailable, pea protein - high bioavailable, pea protein low bioavailable, protein-free meal) on five different study days in a random order. Five hours after consuming the test meals ileostomy bags will be collected and the content will be analysed to answer the above mentioned research questions.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
TRIPLE
Enrollment
11
Participants will consume a protein meal consisting of cooked whole oat kernels (amount based on body weight, 0.3g of protein/kg bodyweight).
Participants will consume a protein meal consisting of heated oat protein concentrate (amount based on body weight, 0.3g of protein/kg bodyweight).
Participants will consume a protein meal consisting of cooked whole yellow peas (amount based on body weight, 0.3g of protein/kg bodyweight).
Participants will consume a protein meal consisting of heated pea protein isolate (amount based on body weight, 0.3g of protein/kg bodyweight).
Participants will consume a protein-free meal to correct analyses for endogenous protein losses.
Örebro University
Örebro, Sweden
RECRUITINGTrue ileal digestibility of different plant-based proteins
The primary outcome is defined as the differences in the true ileal digestibility, determined by measuring the amount of nitrogen in the meal and the amount of unabsorbed nitrogen in the ileal fluid after consuming four different plant-based protein meals
Time frame: 0-5 hours after consumption of test meal (on all 5 study days)
Protein and metabolite profiles in ileostomy digesta
The secondary outcomes are defined as changes in protein and metabolite profiles in the digesta, determined by proteomics and metabolomic analyses.
Time frame: 0-5 hours after consumption of test meal (on all 5 study days)
Differences between in vivo and in vitro data
Results from the human ileostomy model will be compared with results from in vitro digestion according to the Infogest 2.0 protocol for each of the tested plant-based proteins
Time frame: In vivo data: 0-5 hours after consumption of test meal (on all 5 study days)
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