The Role of Microbiome in Recurrent Obesity Before and After Antibiotic/Placebo Treatment
Launched by WEIZMANN INSTITUTE OF SCIENCE · Nov 6, 2024
Trial Information
Current as of August 20, 2025
Recruiting
Keywords
ClinConnect Summary
This clinical trial is exploring how changes in gut bacteria, known as the microbiome, might help people who struggle with obesity to maintain their weight loss. Many people who lose weight end up regaining it, and this study is looking at whether taking antibiotics after losing weight could help prevent that weight regain. The researchers hope to find out if adjusting the microbiome can be a new way to support long-term weight management.
To be eligible for the study, participants should be between 18 and 65 years old and have a body mass index (BMI) between 28 and 35, which indicates they are overweight. They also need to be comfortable using a smartphone app for the study. However, there are certain health conditions and recent treatments that could prevent someone from participating, such as ongoing cancer treatment or certain chronic diseases. If you join the trial, you can expect to take part in assessments and possibly receive an antibiotic treatment, while contributing to important research that could help others with similar struggles in the future.
Gender
ALL
Eligibility criteria
- Inclusion Criteria:
- • 28\<BMI\<35
- • Age - 18-65
- • Capable of working with a smartphone application
- Exclusion Criteria:
- • Consumption of antibiotics/probiotics/oral antifungals 2 months prior to the first day of the experiment.
- • Pregnancy, fertility treatments, breastfeeding women six months prior to enrollment and during the study.
- • Chronic disease, to the discretion of the study team (e.g. AIDS, Cushing syndrome, CKD, acromegaly etc.)
- • Cancer and recent anticancer treatment
- • Psychiatric disorders, to the discretion of the study team.
- • Coagulation disorders
- • IBD (inflammatory bowel diseases)
- • Bariatric surgery.
- • Eating disorders (Anorexia nervosa. Bulimia nervosa. Binge eating disorder, Night eating syndrome).
- • Alcohol or substance abuse
- • Weight loss attempts 6 months prior to the first day of the experiment - using weight loss medication.
- • Drastic changes in nutritional habits six months prior to the first day of the study - to the discretion of the study team.
- • Allergy to penicillin.
- • Life threatening reaction after consumption of cephalosporins.
- • History of CDI
- • Liver disease
- • History of serious unresolved diarrhea in response to antibiotic treatment to the discretion of the study doctor.
About Weizmann Institute Of Science
The Weizmann Institute of Science is a prestigious research institution located in Rehovot, Israel, renowned for its interdisciplinary approach to scientific inquiry. Established in 1934, the Institute is dedicated to advancing knowledge across various fields, including biology, chemistry, physics, and mathematics. Its cutting-edge research and innovation extend to clinical trials, where it collaborates with global partners to translate scientific discoveries into therapeutic applications. The Weizmann Institute's commitment to excellence in research and education makes it a leading sponsor of clinical trials aimed at improving human health and understanding complex biological processes.
Contacts
Jennifer Cobb
Immunology at National Institute of Allergy and Infectious Diseases (NIAID)
Locations
Reẖovot, , Israel
Patients applied
Trial Officials
Hila Elinav, Doctor
Principal Investigator
Hadassah Medical Organization
Timeline
First submit
Trial launched
Trial updated
Estimated completion
Not reported