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Scientists probe the secrets of the Super-Skinny

NCT ID NCT05804929

Knowledge-focused Sponsor: Shenzhen Institutes of Advanced Technology ,Chinese Academy of Sciences 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at healthy adults who are naturally very thin (BMI under 18.5) and compared them to people with a normal weight. Researchers measured body fat, eating habits, hormones, genes, and gut bacteria to understand what keeps these individuals thin without dieting. The goal was simply to learn more, not to test 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.

Participants

104 people

The number who actually took part.

Started

Apr 2023

Finished

May 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

Participants are healthy, with no metabolic disorder, 25 - 40 years old

Ages

25 to 40 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: * Control group (21.5≤ BMI\<25), Superlean group (BMI≤18.5) * Age between 25-40 years old Exclusion Criteria: * Having metabolic diseases or eating disorders * Recent weight loss due to various disease causes * Being treated for weight loss * Having an infectious disease * Pregnant and lactating women * People with blood sickness, pathological hypo- or hypertension * People suffering from claustrophobia * No metal implants in the body * Use of antibiotics, probiotics, oral laxatives, etc. within 8 weeks

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Conditions

The condition(s) this trial relates to.

Food Preferences Health Behavior Thinness

As listed by the trial registrant

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

Health behavior Thinness

Contacts and locations

Locations

  • Shenzhen Institute of Advanced Technology,

    Shenzhen, China

More trials for these conditions

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