Investigating the effects of brain stimulation and probiotics on food decision-making in overweight adults

Comparing the Effectiveness of Transcranial Direct Stimulation (tDCS) and Probiotic Supplementation on Risky Decision-making, Impulsivity, Self-control, and Food Selection in Overweight Adults

Not applicable Interventional University of Tehran · NCT06035718

This study is testing whether brain stimulation and probiotics can help overweight adults make better food choices and control their eating habits.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment60 (estimated)
Ages18 Years to 60 Years
SexAll
SponsorUniversity of Tehran Academic / other
Locations1 site (Tehran)
Trial IDNCT06035718 on ClinicalTrials.gov

What this trial studies

This study aims to explore the effectiveness of transcranial direct current stimulation (tDCS) and probiotic supplementation in improving decision-making related to food choices among overweight individuals. By examining the gut-brain-microbiome axis, the researchers hypothesize that both interventions can enhance self-control and reduce impulsive eating behaviors. Participants will receive either the probiotic blend, tDCS, or a sham treatment to assess the impact on their decision-making processes. The study focuses on individuals with a BMI over 25 and higher than normal fat levels.

Who should consider this trial

Good fit: Ideal candidates for this study are overweight adults with a BMI over 25 and elevated fat levels.

Not a fit: Patients who are pregnant, breastfeeding, or have certain chronic health conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide new strategies for improving self-control and decision-making in overweight individuals, potentially aiding in weight management.

How similar studies have performed: While the combination of tDCS and probiotics is a novel approach, there have been successful studies exploring the individual effects of these interventions on behavior and health.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* BMI over 25
* Higher than normal fat level

Exclusion Criteria:

* Pregnancy
* Breastfeeding
* Smoking more than 10 cigarettes a day
* Excessive consumption of alcohol
* Suffering from chronic cardiovascular and kidney diseases
* Chronic digestive diseases such as celiac disease,
* Chronic inflammatory bowel diseases such as colitis, intestinal surgery, cancer, etc.
* Suffering from acute and chronic diarrhea in the last one month
* Taking antibiotics in two months before the start of the study,
* Continuous use of prebiotic and probiotic products and drugs in one month before the start of the intervention
* Frequent use of antibiotics during the last month before the start of the intervention
* Taking weight loss medications and following a special slimming diet in the last 3 months before the intervention.
* History of epilepsy and seizures, stroke,
* Use of pacemaker
* Presence of metal implanted in the scalp or brain,
* Presence of skin lesions at the tDCS stimulation site, and history of head injury or brain surgery.
* Brain disorders and long-term and chronic use of neuropsychiatric drugs.

Where this trial is running

Tehran

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Overweight and Obesitytranscranial direct current stimulationobesityoverweightimpulse control
Last reviewed 2026-06-13 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.