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Quercetin: a new hope for lung fibrosis?

NCT ID NCT07466420

Disease control Sponsor: Katerina M. Antoniou 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether quercetin, a natural compound found in many fruits and vegetables, can slow lung scarring and improve breathing in people with pulmonary fibrosis. Half of the 100 participants will take quercetin pills daily for 24 weeks, while the other half receive standard care. Researchers will measure changes in lung function, inflammation, and cellular aging markers.

What this could mean

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

Active substance
quercetin (dietary supplement)
What this could lead to
If it works, this could point toward a simple, low-cost supplement to help manage fibrotic lung diseases and slow disease progression.
What could go wrong
This is an early-stage trial with only 100 participants. Quercetin is a supplement, not a proven treatment, and may show no benefit over standard care.

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 100 people

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

Started

Jan 2026

Expected to finish

Jan 2029

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 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Patients with an established diagnosis of IPF and Fibrotic ILD and will be eligible to participate in the study. * The use of the approved standard of care antifibrotic therapy, either nintedanib or pirfenidone, and immunosuppressive therapy will be allowed as standard of care. Exclusion Criteria: * Subjects with a result of FeNO\>25 ppb will be excluded from the study to ensure that no other pulmonary diseases, such as asthma, are present. * Patients who do not initiate quercetin within the first week after their baseline visit.

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Conditions

The condition(s) this trial relates to.

idiopathic pulmonary fibrosis interstitial lung disease pulmonary fibrosis

As listed by the trial registrant

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

Fibrotic interstitial lungs diseases Idiopathic pulmonary fibrosis (IPF) Progressive pulmonary fibrosis

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

  • Respiratory Department, University Hospital of Heraklion, School of Medicine, University of Crete

    RECRUITING

    Heraklion, Crete, 71500, Greece

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