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Scientists scan brains to see how glucagon changes sugar use

NCT ID NCT06877208

Knowledge-focused Sponsor: Nicolai Jacob Wewer Albrechtsen 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This pilot study looks at how the hormone glucagon changes the way the brain uses sugar (glucose) in healthy people aged 55 to 70. Twelve participants will receive infusions of glucagon, glucose, or saline on three separate days, and a special PET/CT scan will measure brain sugar use. The goal is to understand glucagon's role in brain energy, not to treat any disease.

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 12 people

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

Started

Mar 2025

Expected to finish

Aug 2027

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

55 to 70 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: * Age 55 to 70 years * BMI under or equal to 30 kg/m2 * Capable of understanding the participant information and signing the consent form Exclusion Criteria: * Enrolment in other research projects that might interfere with the study * Diabetes diagnosis (type 1 and 2) * Use of medications which, in the opinion of the investigator, may jeopardise participant's safety or compliance with the protocol * Diagnosis of psychiatric disorders, dementias, or any other neurological disorders that in the opinion of the investigator precludes compliance with the study protocol, evaluation of the results or represents an unacceptable risk for the participants safety * Severe claustrophobia * Impaired liver og kidney function * Cardiac problems including any of the following: 1. Classified as being in New York Heart Association (NYHA) class III or IV 2. Angina pectoris (chest pain) within the last 6 months 3. Acute myocardial infarction (heart attack) within last 2 years * Inadequately treated blood pressure at screening defined as repeated resting blood pressure outside the range 90-150 mmHg for systolic and 50-100 mmHg for diastolic. * Active or recent malignant disease * Current or history of severe alcohol use or drug/chemical abuse as per investigator's judgement * Any chronic disorders or severe diseases which, in the opinion of the investigator, might jeopardise participant's safety or compliance with the protocol

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As listed by the trial registrant

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

Cerebral glucose metabolism

Contacts and locations

Locations

  • Department of Clinical Physiology and Nuclear Medicine, Copenhagen University Hospital - Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark

    Copenhagen, 2400, Denmark