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Ear zapper device may curb appetite without drugs

NCT ID NCT07444177

Symptom relief Sponsor: Seoul National University Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 tested a wearable ear device that sends gentle electrical pulses to a nerve to help control appetite. 60 healthy adult women each had two visits: one with the device on and one with it off. Researchers measured how much they ate, their hunger levels, and food cravings. The goal is to find a safe, medicine-free way to manage eating habits.

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

60 people

The number who actually took part.

Started

Jan 2026

Finished

Feb 2026

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

20 to 50 years

Sex

Female participants only

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: * Female participants aged between 20 and 50 years * Body Mass Index (BMI) of 20 or higher * Individuals who are capable of understanding the study procedures and providing voluntary informed consent Exclusion Criteria: * Presence of implanted metallic or electronic medical devices (e.g., cardiac pacemaker, implantable cardioverter defibrillator (ICD), cardiac stent, deep brain stimulator, or cochlear implant), except for dental implants and artificial joints * History of diagnosed psychiatric disorders or current use of psychiatric medications * Moderate to severe depression symptoms, defined as a Patient Health Questionnaire-9 (PHQ-9) score of 10 or higher * Use of medications or medical interventions that may induce weight changes within the past 3 months * Active inflammatory or infectious lesions on the ear (e.g., otitis externa, auricular dermatitis, or active skin infection) * Specific dietary habits or restrictions, such as being a vegan or vegetarian * Known food allergies * Currently pregnant or breastfeeding * History of diagnosed diabetes or other endocrine metabolic diseases * Any other medical condition, illness, or history that, in the investigator's judgment, would make it difficult for the participant to complete the study or complicate the interpretation of study results

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Conditions

The condition(s) this trial relates to.

Feeding Behavior Obesity obesity disorder

As listed by the trial registrant

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

Appetite regulation Eating behaviour Food intake Obesity

Contacts and locations

Locations

  • Seoul National University

    Seoul, South Korea

More trials for these conditions

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