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Could a celery compound help schizophrenia?

NCT ID NCT05204407

Symptom relief Sponsor: University of Maryland, Baltimore 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested whether luteolin, a natural supplement found in celery and chamomile tea, can improve symptoms of schizophrenia. 85 adults with schizophrenia or schizoaffective disorder took either luteolin or a placebo for 12 weeks. Researchers measured changes in overall symptoms, thinking abilities, and markers of inflammation and oxidative stress.

What this could mean

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

Active substance
luteolin (a natural supplement found in foods like celery and chamomile tea)
What this could lead to
If it works, luteolin could offer a natural, add-on option to help ease schizophrenia symptoms.
What could go wrong
This is a small, completed trial with no phase designation. The supplement may not outperform placebo, and results may not apply to everyone with schizophrenia.

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

85 people

The number who actually took part.

Started

Jun 2022

Finished

Jan 2026

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 to 60 years

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: * Either male or female of any race * Age is 18-60 years old * Meets DSM-5 criteria for schizophrenia or schizoaffective disorder * Positive and Negative Syndrome Scale (PANSS) total score of 75 or more OR a Clinical Global Impression severity of illness item score of 4 or more * Clinically stable * Treated with the same antipsychotic for at least 60 days and have received a constant therapeutic dose for at least 30 days prior to study entry * Able to participate in the informed consent process and provide voluntary informed consent Exclusion Criteria: * Meets DSM-5 criteria for alcohol or substance misuse (except caffeine and nicotine) within the last 6 months; or a positive baseline urine drug screen. Participants who meet DSM-5 criteria for marijuana misuse - mild will be included in the study * A current infection, including HIV and Hepatitis C; or an organic brain disorder or medical condition, whose pathology or treatment could alter the presentation or treatment of schizophrenia or significantly increase the risk associated with the proposed treatment protocol * Currently taking immunosuppressive medications (e.g. oral scheduled corticosteroids, chemotherapy or transplantation or HIV/AIDs associated drugs); or anti-inflammatory medications, including NSAIDs (e.g. ibuprofen, celecoxib, or naproxen) or aspirin \> 81 mg on a daily basis. The use of PRN anti-inflammatory agents will be allowed. * Female participants who are pregnant or nursing

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Conditions

The condition(s) this trial relates to.

Psychotic Disorders schizoaffective disorder schizophrenia

As listed by the trial registrant

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

Schizoaffective disorder Schizophrenia

Contacts and locations

Locations

  • Maryland Psychiatric Research Center

    Baltimore, Maryland, 21228, United States

  • University of California, Los Angeles

    Los Angeles, California, 90095, United States

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