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Ear zaps to curb cravings? tiny study tests vagus nerve stimulation on appetite and blood sugar

NCT ID NCT07457372

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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 Jul 21, 2026 · Updated 5 times

Summary

This small study will test whether a non-invasive device that stimulates the vagus nerve through the ear can affect blood glucose levels, food cravings, and the urge to move in healthy young adults aged 18-35. Eight participants will receive both active and sham stimulation to see if there's a measurable difference. The goal is to understand basic body responses, not to treat any disease.

What this could mean

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

Active substance
transcutaneous auricular vagus nerve stimulation (taVNS) device
What this could lead to
If it works, this could help us understand how the vagus nerve influences appetite and blood sugar, possibly pointing toward new ways to manage cravings or metabolism.
What could go wrong
This is a very small, early feasibility study with only 8 healthy participants, so results may not apply to the general public or people with medical conditions. The stimulation is non-invasive and low-risk, but the study hasn't started yet.

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.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

May 2028

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 35 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: * Participants must be between the ages of 18 and 35 as we are focused on recruiting undergraduate and graduate students. Exclusion Criteria: * Participants will be excluded if they have epilepsy, clinically significant tachycardia or arrhythmia, diabetes (Type 1 or Type 2) or another metabolic disease, current pregnancy, any implanted electronic medical device (for example, pacemaker or defibrillator), or a known skin allergy to adhesives that would prevent CGM placement. Participants will also be excluded if they have a history of major depressive disorder if taVNS could reasonably be expected to alter mood symptoms

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As listed by the trial registrant

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

Contacts and locations

Locations

  • University of Minnesota Duluth

    Duluth, Minnesota, 55812, United States

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