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Could Ready-to-Eat meals replace liquid diets before bariatric surgery?

NCT ID NCT06461247

Symptom relief Sponsor: National University Hospital, Singapore 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 26, 2026

Summary

This study compares two pre-surgery diets for people scheduled for bariatric surgery: ready-to-eat meals versus standard liquid meal replacements. The goal is to see which diet is easier to stick to, measured by blood ketone levels and meal logging. About 140 adults will participate, and the study also tracks satisfaction and weight changes.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Very Low Calorie Diet Ready-to-eat (VLCD RTE) meals
What this could lead to
If successful, this could offer a more convenient and palatable pre-surgery diet option, potentially improving weight loss outcomes before bariatric surgery.
What could go wrong
This is a small, early-stage trial focused on compliance, not long-term outcomes. The ready-to-eat meals may not be more effective than the standard liquid diet, and individual results may vary.

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 140 people

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

Started

Jul 2024

Expected to finish

Sep 2026

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

21 to 65 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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.

Inclusion Criteria: * Adults aged 21 to 65 years old * Scheduled for bariatric surgery at least 1 month prior * BMI ≥ 27.5 kg/m2 (with type 2 diabetes mellitus or metabolic syndrome) * Owns a smart phone with data plan * English speaking Exclusion Criteria: * Cognitive impairment. * Hypothyroidism * Chronic kidney disease * Hypothyroidism * Depression with ongoing psychology follow up * Type 1 diabetes * Liver Cirrhosis * Pregnancy * Heart Failure * Active cancer or in remission for less than 5 years * Vegetarian * Observing the fast during the month of Ramadan * Undergoing treatment with anti obesity medications (eg: Phentermine/Orlistat/Contrave/GLP-1 analogues etc)

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Conditions

The condition(s) this trial relates to.

Body Weight obesity disorder Weight Loss

As listed by the trial registrant

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

Bariatric surgery candidate

How to take part

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

  1. The places running it

    2 sites. 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

  • Alexandra Hospital

    RECRUITING

    Singapore, Singapore

  • National University Hospital

    RECRUITING

    Singapore, Singapore

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