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Breath of discovery: scientists hunt for diabetes clues in exhaled air

NCT ID NCT05984979

Knowledge-focused Sponsor: University of Bern Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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 Results may not be published yet.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
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This status has not been confirmed recently, so it may be out of date.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 looks at whether the chemicals in your breath change throughout the day and if those changes are different for people with diabetes. Researchers will measure breath samples from 60 adults—some without diabetes, some with type 1, and some with type 2. The goal is to learn more about these breath patterns, 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

About 60 people

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

Started

Aug 2023

Expected to finish

Jun 2026

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.

Who is studied

60 participants with the following subgroups: Subgroup 1: People without diabetes Subgroup 2: People diagnosed with T1D Subgroup 3: People diagnosed with T2D

Ages

18 years and older

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 Subgroup 1: * Age 18 or older * HbA1c below 6.5% * Written informed consent Subgroup 2: * Age 18 or older * T1D (Type 1 diabetes) with MDI (multiple daily injection) or CSII (Continuous subcutaneous insulin infusion therapy) therapy \>1 year * Written informed consent Subgroup 3 * Age 18 or older * T2D (Type 2 diabetes) with oral antidiabetic medication or insulin therapy * Written informed consent Exclusion criteria * Pregnancy or breastfeeding * Smoking (last cigarette less than 6 months ago) * Any chronical lung and intestinal disease diagnosis (such as intestinal bowel disease (IBD); asthma; COPD (chronic obstructive pulmonary disease); lung cancer, …) * Coeliac disease * Lactose and fructose intolerance * Any acute disease diagnosis (such as viral or bacterial infection) * Drinking habit of more than four units of alcohol per day * Current inhaled medicines treatments * Antibiotic treatment in the previous 4 months

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Conditions

The condition(s) this trial relates to.

diabetes mellitus type 1 diabetes mellitus type 2 diabetes mellitus

As listed by the trial registrant

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

Diabetes mellitus

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • University of Bern

    RECRUITING

    Bern, 3010, Switzerland

More trials for these conditions

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