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The Impact of Probiotics on Bariatric Treatment Outcomes

Study on the Impact of Probiotics on Postoperative Gastrointestinal Symptoms and Gut Microbiota After Sleeve Gastrectomy: A Randomized-Control Trial

Status
Active, not recruiting
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07258732
Acronym
PROBE
Enrollment
200
Registered
2025-12-02
Start date
2025-07-10
Completion date
2026-12-31
Last updated
2025-12-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Obesity &Amp; Overweight

Keywords

obesity, sleeve gastrectomy, constipation

Brief summary

The planned study aims to assess whether probiotics improve the quality of life in patients during the early postoperative period following sleeve gastrectomy, and whether they influence the absorption of micro- and macronutrients. Patients eligible for inclusion will have a BMI of 40 kg/m² or higher and must have successfully completed the qualification process for sleeve gastrectomy. Exclusion criteria include chronic gastrointestinal diseases, antibiotic use within 4 weeks prior to surgery, and lack of consent to participate in the study. On the day before surgery, a stool sample will be collected from each patient for microbiological analysis to assess the composition of gut bacteria. Patients will then undergo sleeve gastrectomy using a standard surgical technique. After the operation, participants will be randomized into two groups. The first group will receive probiotics containing Bifidobacterium animalis AMT30, Bifidobacterium breve AMT32, and Lactobacillus plantarum AMT14. These strains are deposited in the Polish Collection of Microorganisms at the Polish Academy of Sciences in Wrocław and are protected by Polish, European, and U.S. patents. The second group will receive a placebo. As part of follow-up, stool samples will be collected again one month and three months after surgery for comparative microbiological analysis.

Interventions

DIETARY_SUPPLEMENTProbiotic

Probiotics containing Bifidobacterium animalis AMT30, Bifidobacterium breve AMT32, and Lactobacillus plantarum AMT14.

OTHERDiet

Placebo

Sponsors

University of Warmia and Mazury in Olsztyn
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Age over 18 years. 2. BMI over 40 kg/m² or over 35 kg/m² with obesity-related comorbidities. 3. Successful qualification for sleeve gastrectomy. 4. Informed consent to participate in the study.

Exclusion criteria

1. Age under 18 years. 2. Chronic gastrointestinal diseases. 3. Use of antibiotic therapy within 4 weeks prior to surgery. 4. Lack of consent to participate in the study.

Design outcomes

Primary

MeasureTime frameDescription
Assessment of the impact of probiotics on the resolution of constipation after sleeve gastrectomyone and three months after surgeryThe primary outcome of the study is to assess the effect of probiotics on the frequency of defecation in the early weeks following surgery. The patient would be asked whether constipation occurred (yes or no).

Secondary

MeasureTime frameDescription
Assessment of the impact of probiotics on gastrointestinal symptoms after SGone and three months after surgeryThe secondary outcome of the study is to assess the effect of probiotics on the frequency of defecation in the early weeks following surgery. The patient would be asked about the number of stools passing per week.
Metabolic changes after the probiotics use in patients after SGone and three months after surgeryThe secondary aim is to evaluate laboratory tests to identify any metabolic changes associated with probiotic use. It would be: Hemoglobin (Hb): g/dL

Countries

Poland

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026