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Completed

NCT Number: NCT07465562

Galactol® Enzyme Supplement for Post-Prandial Abdominal Bloating in Irritable Bowel Syndrome

This multicenter, randomized, controlled clinical trial aims to evaluate the efficacy and safety of a dietary supplement containing a combination of digestive enzymes (alpha-galactosidase, beta-galactosidase, and prolyl-endopeptidase) in reducing post-prandial abdominal bloating in adults diagnosed with irritable bowel syndrome (IBS).

Participants will be randomly assigned in a 1:1 ratio to receive either the enzyme supplement (Galactol®) in addition to a diet excluding foods high in FODMAPs, or the diet alone. The intervention will be administered for 14 days.

The primary objective is to assess the change in the intensity of post-prandial abdominal bloating measured using a visual analogue scale (VAS). Secondary outcomes include changes in intestinal symptoms, stool consistency, bowel movement frequency, episodes of diarrhea, global gastrointestinal well-being, and treatment tolerability.

The results of this study will provide evidence regarding the potential role of enzyme supplementation in reducing gastrointestinal symptoms associated with food-related fermentation in patients with IBS.

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Key information

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University of Urbino Carlo Bo

Urbino, 61029, Italy

About this study

Irritable bowel syndrome (IBS) is a common functional gastrointestinal disorder frequently associated with post-prandial abdominal bloating and other intestinal symptoms. Certain dietary components, particularly foods high in fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs), can contribute to symptom development through increased intestinal fermentation and gas production.

Dietary strategies such as restriction of high-FODMAP foods are commonly used to manage IBS-related symptoms. However, maintaining strict dietary restrictions can be difficult in routine clinical practice. Enzyme supplementation that facilitates the digestion of specific carbohydrates and gluten-related peptides may represent an alternative or complementary strategy to reduce intestinal fermentation and associated symptoms.

Galactol® is a dietary supplement containing alpha-galactosidase, beta-galactosidase, and a prolyl-endopeptidase derived from Aspergillus niger. These enzymes are intended to promote the digestion of fermentable carbohydrates and gluten-related peptides that may contribute to gastrointestinal discomfort.

This study is designed as a prospective, multicenter, randomized, controlled clinical trial with two parallel groups. Adult participants diagnosed with IBS according to Rome IV criteria and experiencing food-related abdominal bloating will be enrolled.

Participants will be randomly assigned in a 1:1 ratio to receive either Galactol® supplementation in addition to a diet excluding foods high in FODMAPs, or the diet alone. The treatment period will last 14 days.

Clinical assessments will be conducted at baseline and at the end of treatment. Outcomes will include evaluation of abdominal bloating intensity using a visual analogue scale (VAS), assessment of additional gastrointestinal symptoms, stool consistency using the Bristol Stool Scale, frequency of bowel movements, episodes of diarrhea, global gastrointestinal well-being, and treatment safety and tolerability.

The study aims to determine whether enzyme supplementation may improve gastrointestinal symptoms related to food intake in patients with IBS.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Adults aged 18 years or older
  • Diagnosis of irritable bowel syndrome (IBS) according to Rome IV criteria
  • Presence of abdominal discomfort and bloating related to food ingestion
  • Ability and willingness to provide written informed consent

Exclusion criteria

  • Age under 18 years
  • Antibiotic therapy within 30 days prior to enrollment
  • Presence of organic gastrointestinal diseases
  • History of digestive system resection
  • Pregnancy or breastfeeding
  • Drug use or alcohol abuse during the study period
  • Inability or refusal to provide written informed consent

Treatment and study plan

Galactol®

Dietary Supplement

Galactol® is a dietary supplement containing alpha-galactosidase, beta-galactosidase, and prolyl-endopeptidase derived from Aspergillus niger. The supplement is administered orally as two tablets at lunch and two tablets at dinner daily for 14 days.

Other names: Digestive enzyme supplement

High-FODMAP Exclusion Diet

Behavioral

Participants follow a diet excluding foods high in fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) during the 14-day study period.

Primary outcomes

  1. Change in Post-Prandial Abdominal Bloating Intensity

    Time frame: Baseline (Day 0) to Day 14

    Change in the intensity of post-prandial abdominal bloating measured using a 0-10 visual analogue scale (VAS), where 0 indicates no symptoms and 10 indicates the worst symptoms.

Secondary outcomes

  1. Change in Intestinal Symptoms

    Time frame: Baseline to Day 14

    Change in the intensity of intestinal symptoms including flatulence, abdominal discomfort, abdominal pain, and bowel urgency assessed using a 0-10 visual analogue scale (VAS).

  2. Change in Stool Consistency

    Time frame: Baseline to Day 14

    Stool consistency assessed using the Bristol Stool Scale (types 1-7).

  3. Change in Frequency of Bowel Movements

    Time frame: Baseline to Day 14

    Average number of bowel movements per day during the evaluation period.

  4. Episodes of Diarrhea

    Time frame: Baseline to Day 14

    Number of diarrhea episodes per day recorded during the study period.

  5. Global Gastrointestinal Well-Being

    Time frame: Day 14

    Participant-reported perception of gastrointestinal well-being using the Global GI Well-Being Scale (improved, unchanged, or worsened symptoms).

  6. Treatment Adherence and Tolerability

    Time frame: Day 14

    Treatment adherence assessed as percentage of prescribed tablets taken and tolerability evaluated using a 0-10 scale at the end of treatment.

Sponsors and collaborators

Lead sponsor

Liaquat University of Medical & Health Sciences

Other

Collaborators

  • University of Urbino "Carlo Bo"

Registry information

Official study title

Efficacy of a Mix of Specific Enzymes and Peptidases in Reducing Food-Related Abdominal Bloating: A Multicenter, Randomized, Controlled Clinical Trial

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Mar 12, 2026
Registry last updated
Jun 5, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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