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Could a diet and drug combo replace the knife for severe obesity?

NCT ID NCT06309238

Disease control Sponsor: Carsten Dirksen Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Aug 21, 2026 · Updated 1 time

Summary

This study compares two approaches for adults with severe obesity: an intensive non-surgical program (meal replacements, behavior support, and weight-loss medication) versus bariatric surgery. Researchers will track 500 participants to see which method better improves health and quality of life. The goal is to offer more effective, non-surgical options for people who currently only have surgery as a treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 500 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2024

Expected to finish

Dec 2048

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 60 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Please note that participants need to be invited in order to take part in the trial. Inclusion Criteria: * Aged 18 to 60 years (inclusive) at time of screening. * Eligible for and willing to undergo bariatric surgery, i.e., fulfilment of criteria for bariatric surgery from the respective national health authorities: * DK: BMI ≥ 35 kg/m2 with one or more of the following: T2D, severe hypertension, sleep apnoea requiring treatment, symptomatic arthrosis in lower extremities, female infertility related to overweight, or BMI\>40 kg/m2 with other strong medical reasons for weight loss (28). Prior to surgery, an 8% weight loss is required as well as smoking cessation. * UK: BMI of 35 kg/m2 to 40 kg/m2 and other significant disease (e.g., type 2 diabetes or high blood pressure), or BMI ≥40 kg/m2. Has been or is willing to receive intensive management in a specialist tier 3 obesity service (29). * Fit for anaesthesia and surgery. * Informed consent. Exclusion Criteria: * Prior bariatric or hiatal surgery, not including intragastric balloons or duodenal-jejunal bypass sleeve (Endobarrier™ or similar) if the device has been removed \>1 year before screening. * Use of any WLM (including liraglutide and semaglutide for diabetes) within last 3 months. * Conditions that contraindicate or complicate total diet replacement (including type 1 diabetes or other diabetes requiring basal bolus insulin therapy or insulin pump therapy (for Denmark) and any diabetes requiring insulin therapy (for UK), phenylketonuria, or other conditions requiring strict adherence to special diets). * Conditions that contraindicate or complicate treatment with GLP-1 receptor analogues (including history of pancreatitis or known allergies). * Conditions that contraindicate or complicate bariatric surgery (GI motility disorders, large abdominal wall hernia, large hiatus hernia (\>5cm), Crohn's disease, liver cirrhosis, or other conditions preventing laparoscopic bariatric surgery e.g. multiple previous abdominal surgery). * Conditions that contraindicate or complicate study adherence and bariatric surgery (mental disorder, unstable psychiatric disease, recent history of alcohol/medication abuse, cancer treatment within 5 years). * Pregnant or planning pregnancy in the next two years or currently breast feeding. * Not achieving a 5% weight loss within 12 weeks prior to randomisation. * People taking part in other research involving multidisciplinary obesity treatment that would compromise their participation in this trial. * Another member of the household enrolled in the trial. * Diagnosis of or treatment for severe eating disorder within the last 6 months.

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Conditions

The condition(s) this trial relates to.

morbid obesity Obesity obesity disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Obesity

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    14 sites in 2 countries. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Department of Surgery, Viborg Regional Hospital

    RECRUITING

    Viborg, 8800, Denmark

  • Hartlands Hospital, University Hospitals Birmingham NHS Foundation Trust

    RECRUITING

    Birmingham, B9 5SS, United Kingdom

  • Huddersfield Royal Infirmary

    RECRUITING

    Huddersfield, United Kingdom

  • King's College Hospital

    RECRUITING

    London, United Kingdom

  • Luton and Dunstable University Hospital

    RECRUITING

    Luton, United Kingdom

  • Musgrove Park Hospital, Somerset Foundation NHS Trust

    RECRUITING

    Taunton, TA1 5DA, United Kingdom

  • Southmead Hospital, North Bristol NHS Trust

    RECRUITING

    Bristol, BS10 5NB, United Kingdom

  • St Richard's Hospital

    RECRUITING

    Chichester, Sussex, PO19 6SE, United Kingdom

  • Steno Diabetes Center Aarhus, Aarhus Universitets Hospital

    RECRUITING

    Aarhus, 8200, Denmark

  • Sunderland Royal Hospital

    RECRUITING

    Sunderland, SR4 7TP, United Kingdom

  • The Department of Medicine and Department of Surgery, University Hospital of South West Jutland

    RECRUITING

    Esbjerg, 6700, Denmark

  • The Department of Medicine and the Gastro Unit, Copenhagen University Hospital - Amager and Hvidovre

    RECRUITING

    Hvidovre, 2650, Denmark

  • The Whittington Hospital

    RECRUITING

    London, N19 5NF, United Kingdom

  • University Hospital Coventry

    RECRUITING

    Coventry, United Kingdom

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