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Can a very low calorie diet keep weight off long term? small study investigates

NCT ID NCT07418281

Knowledge-focused Sponsor: University of Pisa Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study from the University of Pisa examined how a very low calorie ketogenic diet (VLCKD) affects body weight and energy use over time in 17 people with obesity. Participants followed the diet and were then monitored for changes in body composition and 24-hour metabolism. The goal was to see if the diet leads to lasting weight loss and metabolic improvements.

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 ketogenic diet (VLCKD)
What this could lead to
If successful, this could help clarify whether VLCKD leads to lasting weight loss and metabolic changes in people with obesity.
What could go wrong
This is a small, completed study with only 17 participants and no control group, so results may not apply broadly. Long-term safety and effectiveness are not established.

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.

Participants

17 people

The number who actually took part.

Started

Oct 2022

Finished

Oct 2025

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.

Who is studied

patients with obesity without diabetes

Ages

18 to 75 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: * obesity Exclusion Criteria: * diabetes

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder Overweight

As listed by the trial registrant

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

Obesity & overweight

Contacts and locations

Locations

  • Univeristy Hospital of Pisa

    Pisa, 56124, Italy

More trials for these conditions

Other studies related to the condition(s) this trial covers.