Clinical trial Recruiting at 1 site Observational Ages 18 to 65

Predicting Weight Loss After Obesity Treatments

Official title: Research of Predictive Factors of Weight Loss After Pharmacological or Surgical Treatment in Patients Suffering From Obesity

Run by Université Catholique de Louvain · NCT07402031 · Data updated 2026-11-12

This study tests what factors predict how much weight people lose after either obesity medications or bariatric surgery.

Quick facts

Study typeObservational
Ages18 Years to 65 Years
SexAll
Enrollment100 (estimated)
SponsorUniversité Catholique de Louvain
Academic / other
Locations1 site (Brussels, Brussels Capital)
StatusRecruiting
StartedMay 5, 2026
Main results expectedJune 2032
Study endsJanuary 2036
Registry record updatedMay 14, 2026
Trial IDNCT07402031 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 18–65 with obesity who are being considered for bariatric surgery or pharmacological treatment and who speak French.

Probably not a fit

Individuals not undergoing a weight loss intervention or not meeting eligibility criteria may not benefit from predictive insights.

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

What this trial studies

This observational study looks for factors that predict weight loss response to obesity treatments, including drugs or surgery, in adults with obesity. It also aims to understand the cognitive and biological processes that may mediate response and how eating behavior might influence outcomes. Researchers will collect data from participants evaluated for bariatric surgery or pharmacological therapy and analyze which characteristics are linked to better or worse weight loss. The goal is to help tailor care pathways based on individual predictors. The study is conducted at Cliniques Universitaires Saint-Luc in Brussels and led by Université Catholique de Louvain.

Why it matters

Potential benefit: If successful, findings could help clinicians personalize obesity treatment plans to improve weight loss outcomes.

How similar studies have gone: Previous work in obesity treatment has shown variability in response, with some success in identifying predictors, though mechanisms remain incompletely understood.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion criteria:

* Age between 18 and 65 years
* Obesity, with bariatric surgery indicated after a multidisciplinary evaluation in case of surgical treatment.
* Good physical and mental health, enabling informed consent.
* French speaker

Exclusion criteria:

* Legal protection
* Pregnancy or breastfeeding
* History of bariatric surgery (except gastric banding, provided it was removed more than five years ago).
* Acute or progressive chronic disease
* Alcohol consumption of more than 20 g/day
* Inflammatory bowel disease;
* Digestive autonomic diabetic neuropathy.
* Consumption of dietary supplements (stanols, probiotics, prebiotics or omega-3).
* Following a vegan or gluten-free diet or being lactose intolerant.
* Fibre consumption \>30 g/day
* Recent change in antidiabetic medication within the past 3 months.

Where it's running

  • Cliniques Universitaires Saint-Luc
    Brussels, Brussels Capital, Belgium
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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.