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Could changing when you eat protein help parkinson symptoms?

NCT ID NCT05437640

Disease control Sponsor: University of Alabama at Birmingham 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This pilot study explores whether the timing and amount of protein in meals can help preserve muscle health and improve sleep in people with Parkinson disease. Participants follow either a protein redistribution diet (low protein during the day, high protein at dinner) or a protein consistent diet (equal protein at each meal). Researchers measure muscle metabolism, grip strength, sleep quality, and motor symptoms to see if one pattern works better alongside standard levodopa treatment.

What this could mean

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

Active substance
Protein Redistribution Diet or Protein Consistent Diet
What this could lead to
If successful, this could point toward a simple dietary strategy to help people with Parkinson disease maintain muscle strength and improve sleep without changing medication.
What could go wrong
This is a very small pilot study with only 12 participants, so results may not apply to everyone. Dietary changes can be hard to follow long-term, and the study does not test a drug or cure.

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

12 people

The number who actually took part.

Started

Oct 2022

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

45 to 99 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: * Clinical diagnosis of idiopathic PD for 5 or more years * 45 years or older * On a stable levodopa regimen for 3 or more months * Self-reported to experience motor fluctuations Exclusion Criteria: * Following a specific diet that would preclude participation * Renal disease * Deep brain stimulation * Known narcolepsy * Untreated sleep apnea * Any condition that, in the opinion of the investigator, will preclude the participant from successfully or safely completing study procedures

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Conditions

The condition(s) this trial relates to.

Parkinson disease

As listed by the trial registrant

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

Parkinson disease

Contacts and locations

Locations

  • University of Alabama at Birmingham

    Birmingham, Alabama, 35233, United States

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