Clinical trial Recruiting at 1 site Interventional Ages 15 to 50 Women only

Dietary guidance and probiotics for pelvic pain in women with endometriosis and IBS

Official title: Impact of Dietary Guidance and Probiotics in the Treatment of Chronic Pelvic Pain Secondary to Endometriosis and Irritable Bowel Syndrome in Women: A Randomized, Double-Blind Clinical Trial

Run by University of Sao Paulo · NCT07149519 · Data updated 2026-11-12

This trial will try dietary guidance and Lactobacillus probiotics to see if they reduce chronic pelvic pain in women who have both endometriosis and irritable bowel syndrome.

More Endometriosis trials

Quick facts

Study typeInterventional
Ages15 Years to 50 Years
SexWomen only
Enrollment74 (estimated)
SponsorUniversity of Sao Paulo
Academic / other
Locations1 site (Catanduva, São Paulo)
StatusRecruiting
StartedMarch 1, 2025
Main results expectedJune 30, 2028
Study endsFebruary 15, 2029
Registry record updatedSeptember 2, 2025
Trial IDNCT07149519 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Women aged 18–50 with diagnosed endometriosis and concurrent irritable bowel syndrome who can give informed consent and agree to be randomized and participate exclusively during the study period are ideal candidates.

Probably not a fit

Women with severe or uncontrolled chronic medical conditions, or with other gastrointestinal diseases such as inflammatory bowel disease or celiac disease, and those outside the 18–50 age range are unlikely to benefit or be eligible.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Participants with endometriosis and coexisting irritable bowel syndrome will be randomized to different intervention arms that include dietary guidance and use of Lactobacillus probiotics. The study will follow participants over a treatment period to record changes in chronic pelvic pain and bowel symptoms. Investigators will compare symptom scores between the groups to determine whether non‑pharmacological approaches relieve pain and improve bowel habits. The trial aims to clarify the role of diet and gut microbiota modulation in managing these overlapping conditions.

Why it matters

Potential benefit: If successful, the interventions could reduce chronic pelvic pain and improve bowel symptoms and quality of life using non‑drug approaches.

How similar studies have gone: Previous studies of anti‑inflammatory diets and some probiotic trials have reported symptom improvements in endometriosis and IBS, but evidence is mixed and larger randomized trials remain limited.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Women between 18 and 50 years of age who wish to participate in the clinical trial;
2. Willingness to voluntarily participate in the study and accept randomization to any of the three treatment arms;
3. Participating exclusively in this clinical trial during the study period;
4. Signing the Informed Consent Form (ICF) approved by the Research Ethics Committee (CEP) and CONEP

Exclusion Criteria:

1. Chronic, severe, or uncompensated clinical conditions, such as: malnutrition (BMI \<18); insulin-dependent diabetes (types 1 or 2); uncontrolled hypertension; lung disease such as asthma or other chronic obstructive pulmonary disease; hematologic and liver diseases; advanced-stage chronic kidney disease (grades 3, 4, and 5); metabolic disorders; and immunosuppression;
2. Clinical conditions of the gastrointestinal tract that cause IBS-like symptoms, such as: inflammatory bowel disease (Chron's disease, ulcerative colitis), microscopic colitis, celiac disease, and lactose intolerance;
3. Endometriosis requiring surgical treatment during the study period;
4. Severe eating disorders, such as: bulimia, anorexia nervosa, and binge-eating disorder;
5. Chronic use of any medication with potential interaction with probiotics, the intestinal microbiota, or the natural progression of the disease in the last 6 months (such as probiotics, antibiotics, antifungals, antihistamines, digestive medications, or treatments for constipation or diarrhea);
6. Patients who already consume healthy foods or are on a restrictive diet more than four days a week, which may affect the evaluation results;
7. Patients whose stool protopastological examination is altered;
8. Inability to use oral medication;
9. Pregnancy or lactation;
10. History of alcohol or drug dependence;
11. Smoking in the last three years;
12. Inability to cooperate with investigators due to cognitive impairment or mental state.

Where it's running

  • Letícia Ferracini Lenharo Hayashi
    Catanduva, São Paulo, Brazil
    Recruiting

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.