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Scientists probe cell energy in long COVID mystery

NCT ID NCT07134673

Knowledge-focused Sponsor: Universitair Ziekenhuis Brussel 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 how the body's cells use oxygen in people with long COVID compared to those fully recovered. Researchers will measure oxygen use in blood cells, skin, and muscle to see if there are differences. The goal is to better understand long COVID and test if these measurements could help diagnose the condition. About 54 adults will take part.

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 54 people

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

Started

Jan 2026

Expected to finish

Jul 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

Study participants will be recruited in the Universitair Ziekenhuis Brussel, from the general population in Belgium through traditional and social media, as well as in the vicinity of the study site through leaflets and posters.

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.

Individuals with long COVID: Inclusion criteria: * Long COVID diagnosis, based on the WHO definition; * Presence of long COVID symptoms for a minimum of 6 months. * History of confirmed or documented SARS-CoV-2 infection. * Adult (≥18 years of age). * Post-COVID-19 Functional Status Scale grade 2-4, while they had a grade 0 before the SARS-CoV-2 infection. Exclusion criteria: * Pre-existing chronic diseases potentially affecting the functional status scale. * Treatment with metabolism altering drugs. * \> 10 standard units of alcohol (10 grams of alcohol/glass) per week. * Unable to understand oral and written instructions in Dutch, French or English. * Allergies to medical adhesive bandages. * Porphyria and other skin conditions aggravated by sunlight. Convalescent individuals Inclusion criteria: * History of confirmed or documented SARS-CoV-2 infection. * Complete recovery after the SARS-CoV-2 infection, no history of long COVID based on the WHO definition; * Post-COVID-19 Functional Status Scale \[2\] grade 0 both before the infection and currently. * Adult (≥18 years of age). Exclusion criteria: * Pre-existing chronic non-communicable diseases (e.g. hypertension, chronic respiratory diseases, diabetes). * Treatment with metabolism altering drugs. * \> 10 standard units of alcohol (10 grams of alcohol/glass) per week. * Unable to understand oral and written instructions in Dutch, French or English. * Allergies to medical adhesive bandages. * Porphyria and other skin conditions aggravated by sunlight.

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Conditions

The condition(s) this trial relates to.

inborn mitochondrial metabolism disorder long COVID-19 post-COVID-19 disorder

As listed by the trial registrant

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

Long COVID Post-COVID-19 condition

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

  • Laarbeeklaan 101

    RECRUITING

    Jette, Brussels Capital, 1090, Belgium

More trials for these conditions

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