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Brain fuel mystery: Glucagon's role in thinking and sugar

NCT ID NCT06921824

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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 pilot study looked at how the hormone glucagon affects brain function and sugar use in 16 healthy adults. Participants received a gradually increasing dose of glucagon through an IV over three hours. The goal was to find the dose that changes blood sugar and other markers, helping researchers understand glucagon's role in the brain.

What this could mean

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

Active substance
Glucagon
What this could lead to
If successful, this could help scientists understand how glucagon affects the brain and sugar use, possibly pointing toward new treatments for metabolic or cognitive disorders.
What could go wrong
This is a very small, early pilot study in healthy people, not patients. It only looks at short-term effects, so results may not apply to real-world conditions or lead to any 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.

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

16 people

The number who actually took part.

Started

Mar 2025

Finished

Sep 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.

Ages

25 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: * Capable of understanding the participant information and signing the consent form * Between 25 and 70 years of age at the time of screening * Body mass index (BMI) ≤ 25 kg/m2 at the time of screening Exclusion Criteria: * Enrolment in other research projects that might interfere with the study * Diabetes diagnosis (type 1 and 2) * Pregnancy or breastfeeding * Use of medications which, in the opinion of the investigator, may jeopardise participant's safety or compliance with the protocol * Impaired liver function defined as either alanine aminotransferase (ALAT) and/or aspartate aminotransferase (ASAT) ≥ 2 times normal values * Kidney disease defined as serum creatinine levels ≥ 126 μmol/L for male and ≥ 111 μmol/L for female * 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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Conditions

The condition(s) this trial relates to.

glucose metabolism disease

As listed by the trial registrant

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

Glucagon Glucose metabolism

Contacts and locations

Locations

  • Department of Clinical Biochemistry, Copenhagen University Hospital - Bispebjerg and Frederiksberg, Copenhagen, Denmark

    Copenhagen, 2400, Denmark

More trials for these conditions

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