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Your plate may fight psoriatic arthritis: diet study tests food as medicine

NCT ID NCT04180904

Disease control Sponsor: University of Pennsylvania 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 29, 2026 · Last updated Jun 30, 2026 · Updated 1 time

Summary

This study investigates whether changing diet can reduce disease activity in people with psoriatic arthritis. Participants are randomly assigned to one of two diets: one focusing on which foods are eaten, and another limiting daily calorie intake. The trial lasts 24 weeks and includes adults aged 18–80 with a confirmed diagnosis and moderate-to-high disease activity.

What this could mean

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

Active substance
dietary intervention (food-focused diet vs. calorie-restricted diet)
What this could lead to
If successful, this could show that dietary changes help control psoriatic arthritis symptoms, offering a non-drug way to manage the disease.
What could go wrong
This is a small, early-stage study without a placebo control, so results may not be conclusive. Diet changes can be hard to maintain, and benefits may vary from person to person.

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

92 people

The number who actually took part.

Started

Mar 2021

Finished

Nov 2024

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 80 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: * Age 18-80 * Required Rheumatologist-confirmed diagnosis of PsA fulfilling Classification of Psoriatic Arthritis Criteria (CASPAR) * Willing to alter diet and participate for 24 weeks * Able to attend follow-up visits * Body mass index (BMI) \> 25 and \<40 * No history of eating disorders such as anorexia or bulimia * Disease Activity in Psoriatic Arthritis Assessment (DAPSA) \> 10 * Stable treatment for PsA for ≥3 months prior to enrollment (patients may be on any disease modifying anti-rheumatic drugs (DMARDs) or they can be free of systemic medications * Owns and uses an iPhone or Android smart phone, or is willing to use a device provided by the study team Exclusion Criteria: * Inability to provide informed consent * Plan to change systemic treatment for psoriasis or PsA in the next 4-8 weeks * Use of systemic corticosteroids * All persons who would be placed at an increased risk including any medical condition that will impair the ability of the person to participate in a nutritional intervention study (e.g. insulin dependent diabetes, use of coumadin, advanced malignancy, inflammatory bowel disease, dementia) * History of food allergy to any of the components of olive oil or nuts * Inability to read and write in English * Unwillingness to change dietary habits * Known pregnancy (pregnancy testing will be performed for women of childbearing age; weight changes will not accurately reflect the changes we would anticipate in pregnant patients and weight loss may be detrimental to maternal and/or fetal outcomes). * Participation in another physical activity study and/or diet trial

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Conditions

The condition(s) this trial relates to.

psoriatic arthritis Salivary Gland Adenoma, Pleomorphic

As listed by the trial registrant

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

Psoriatic arthritis

Contacts and locations

Locations

  • University of Pennsylvania

    Philadelphia, Pennsylvania, 19104, United States

  • Women's College Hospital, University of Toronto

    Toronto, Ontario, Canada

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