CClinicalTrials.gg
CompletedNCT03207516DigeribilitàUpdated Jul 2, 2017

Sourdough Bakery Products and Digestive Function

An interventional study of Sourdough --> Brewer's Yeast and Brewer's Yeast --> Sourdough in Dyspepsia, sponsored by Irccs Sdn. Completed. Open to participants aged 18 Years to 40 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2017-07-02.

Sponsored by Irccs Sdn · Not applicable, Interventional, and Supportive care

From the registry’s dates

  • Registered 2 years 11 months after the study started (first participant enrolled Jul 2014, registered Jun 2017).
Phase
Not applicable
Study type
Interventional
Enrollment
17
Allocation
Randomized
Ages
18 Years to 40 Years
Sex
All
01

Study summary

In a double-blind, randomised crossover study, two sourdough croissants (SC) or two brewer's yeast croissants (BC) were served to 17 (9 F; Age range 18-40; BMI range 18-24 kg/m2) healthy subjects to evaluate the effects of their ingestion on postprandial gastrointestinal functions. Hydrogen breath test was performed to measure H2 production after SC and BC ingestion. Gastric volume was evaluated by Magnetic Resonance(MR) Imaging to calculate gastric emptying rate in the 3-hour interval following croissant ingestion. Palatability and postprandial gastrointestinal symptoms and perceptions over a 4-h period after the meal were evaluated by visual analogue scale (VAS). In addition, in the 3-hour interval, blood samples were drawn to measure serum glucose levels. The area under the curve (AUC) was employed to evaluate global kinetics of all parameters and the T-test was used to evaluate differences between groups.

Read the detailed description

In this monocentric study, a double-blind, randomised crossover design was used, with washout periods of at least one week between study days. A standardized meal consisting of two 100 g croissants prepared with sourdough or with brewer's yeast was administered randomly to 17 (9 F; Age range 18-40; BMI range 18-24 kg/m2) healthy subjects after an overnight fast (at least 8 h) and consumed in a 10-minute interval with 300 mL of water. Immediately after meal ingestion, subjects were asked to evaluate croissant palatability. Gastric volume was evaluated by Magnetic Resonance(MR) Imaging to calculate gastric emptying rate in the 3-hour interval following croissant ingestion. Hydrogen breath test was performed to assess gastrointestinal fermentation measuring H2 production after SC and BC ingestion. Postprandial gastrointestinal symptoms and perceptions over a 4-h period after the meal were evaluated by visual analogue scale (VAS). In addition, in the 3-hour interval, blood samples were drawn to measure serum glucose levels. The protocol was repeated twice in each subject, once with sourdough croissants (SC) and once with brewer's yeast croissants (BC), dispensed according to a computer generated randomisation list created by RC following simple randomisation procedures (computerized random numbers). The area under the curve (AUC) was employed to evaluate global kinetics of all parameters and the T-test was used to evaluate differences between groups.

02

Conditions studied

  • Dyspepsia

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Keywords

  • sourdough; leavening process; fermentation; brewer's yeast
03

In context

Dyspepsia

363 studies on the registry are indexed under Dyspepsia; 51 are open to participants now.

This study's enrollment of 17 is below the median of 87 across 297 interventional studies indexed under Dyspepsia.

Browse Dyspepsia studies →

Lead sponsor

This is the only study on the registry with Irccs Sdn as lead sponsor.

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

04

Who can participate

Ages eligible
18 Years to 40 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • age ranging between 18 and 40 yrs
  • normal-weight (body mass index 18-24.9 kg/m2),

Exclusion criteria

Exclusion criteria:

  • smoke
  • functional or organic gastrointestinal disease
  • gluten allergy
  • dyslipidemia
  • diabetes
  • psychiatric disorders
  • claustrophobia
  • pregnancy
  • breast-feeding
05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Double (Participant, Investigator)
Enrollment
17 participants (actual)

Study arms

  • Active comparator
    Sourdough --> Brewer's Yeast

    Sourdough --\> Brewer's Yeast 1. administration of two 100 g croissants prepared with sourdough after an overnight fast. 2. Magnetic Resonance (MR) Imaging analysis of gastric emptying, evaluation of postprandial gastrointestinal fermentation, croissant palatability, gastrointestinal symptoms and perceptions, and serum glucose levels at several time points. 3. washout period: 7 days 4. administration of two 100 g croissants prepared with brewer's yeast after an overnight fast. 5. Magnetic Resonance (MR) Imaging analysis of gastric emptying, evaluation of postprandial gastrointestinal fermentation, croissant palatability, gastrointestinal symptoms and perceptions, and serum glucose levels at several time points.

    Dietary Supplement: Sourdough --> Brewer's Yeast · Dietary Supplement: Brewer's Yeast --> Sourdough

  • Active comparator
    Brewer's Yeast --> Sourdough

    Brewer's Yeast --\> Sourdough 1. administration of two 100 g croissants prepared with brewer's yeast after an overnight fast. 2. Magnetic Resonance (MR) Imaging analysis of gastric emptying, evaluation of postprandial gastrointestinal fermentation, croissant palatability, gastrointestinal symptoms and perceptions, and serum glucose levels at several time points. 3. washout period: 7 days 4. administration of two 100 g croissants prepared with sourdough after an overnight fast. 5. Magnetic Resonance (MR) Imaging analysis of gastric emptying, evaluation of postprandial gastrointestinal fermentation, croissant palatability, gastrointestinal symptoms and perceptions, and serum glucose levels at several time points.

    Dietary Supplement: Sourdough --> Brewer's Yeast · Dietary Supplement: Brewer's Yeast --> Sourdough

Interventions

  • Dietary supplementSourdough --> Brewer's Yeast

    Impact of bakery products with sourdough or brewer's yeast on digestive function

  • Dietary supplementBrewer's Yeast --> Sourdough

    Impact of bakery products with sourdough or brewer's yeast on digestive function

06

What researchers measure

Primary outcomes

  1. Change of gastric emptying

    Gastric volume in mL was evaluated by Magnetic Resonance(MR) Imaging using a 3-Tesla MR scanner (Biograph mMR, Siemens Healthcare, Erlangen, Germany) to calculate gastric emptying rate in the 3-hour interval following croissant ingestion

    Time frame: 0, 3, 6, 9, 12, 15, 20, 25, 30, 45, 60, 75, 90, 120, 150, 180 minutes after the ingestion of the test meal

Secondary outcomes

  1. Change of gastrointestinal fermentation

    Hydrogen breath test (Gastrolyzer+TMMedimar) was performed to measure H2 production expressed in ppm after SC and BC ingestion

    Time frame: The hydrogen concentration in end expiratory air (expressed in ppm) was determined before consuming the test meal and then at 45, 60, 90, 120, 150, 180 and 240 minutes following meal ingestion.

  2. Palatability

    Palatability were evaluated by visual analogue scale (VAS, expressed in mm)

    Time frame: Croissant palatability was evaluated immediately after meal ingestion

  3. Change of gastrointestinal symptoms

    postprandial gastrointestinal symptoms (gastrointestinal discomfort, bloating, nausea, fullness) were evaluated by visual analogue scale (VAS, expressed in mm) over a 4-h period after the meal

    Time frame: The presence and severity of gastrointestinal symptoms were assessed before test meal ingestion and at 45, 60, 90, 120, 150, 180 and 240 minutes after ingestion.

  4. Change of gastrointestinal perceptions

    postprandial gastrointestinal perceptions (hunger, appetite, satiety and gastrointestinal wellbeing) were evaluated by visual analogue scale (VAS, expressed in mm) over a 4-h period after the meal

    Time frame: The presence and severity of gastrointestinal perceptions were assessed before test meal ingestion and at 45, 60, 90, 120, 150, 180 and 240 minutes after ingestion.

  5. Glycemic profile

    blood samples were drawn to measure serum glucose levels in mg/dL

    Time frame: Blood samples were collected before test meal ingestion and at 15, 45, 60, 90, 120 and 180 minutes after the meal.

07

Study locations

No study locations are listed for this record.

08

References and documents

Publications

  • Polese B, Nicolai E, Genovese D, Verlezza V, La Sala CN, Aiello M, Inglese M, Incoronato M, Sarnelli G, De Rosa T, Schiatti A, Mondelli F, Ercolini D, Cuomo R. Postprandial Gastrointestinal Function Differs after Acute Administration of Sourdough Compared with Brewer's Yeast Bakery Products in Healthy Adults. J Nutr. 2018 Feb 1;148(2):202-208. doi: 10.1093/jn/nxx049. PubMed 29490103 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 2, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03207516
Lead sponsor
Irccs Sdn
Collaborators
Federico II University, Fresystem S.p.A.
Responsible party
EMANUELE NICOLAI (Principal Investigator, Irccs Sdn) — Principal investigator
First posted
Jul 2, 2017
Start date
Jul 22, 2014
Primary completion
Apr 28, 2015
Completion
Apr 28, 2015
Last update
Jul 2, 2017

Study contacts

Emanuele Nicolai
principal investigator · Irccs Sdn

Oversight

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

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This study is completed, as verified in Jun 2017. You cannot join it, but the record below documents what was studied.

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