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Processed food diet alters hunger hormones in small study

NCT ID NCT06518863

Knowledge-focused Sponsor: Oklahoma State University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looked at how eating ultra-processed foods affects hunger-related hormones and thinking skills. Twenty adults ate only ultra-processed foods for three days and only unprocessed foods for another three days. Researchers measured hormone levels and cognitive function to see if diet type made a difference.

What this could mean

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

What this could lead to
If results show clear links, this could guide future research on how processed foods affect appetite and decision-making.
What could go wrong
This is a small, completed study with only 20 participants. It was not designed to prove cause and effect, so findings may not apply broadly.

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

20 people

The number who actually took part.

Started

Jan 2024

Finished

Oct 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 55 years

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.

Inclusion Criteria: * Adults aged 18-55 * Willing to consume an entirely ultra-processed and entirely unprocessed diet for 3 days each (6 days in total) Exclusion Criteria: * Chronic disease that interferes with study-related activities * Special diet that limits adherence to the intervention diets * Visual impairment not corrected by glasses/contacts * Pregnant or lactating

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Conditions

The condition(s) this trial relates to.

Feeding Behavior

As listed by the trial registrant

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

Diet habit

Contacts and locations

Locations

  • Oklahoma State University

    Stillwater, Oklahoma, 74078, United States

More trials for these conditions

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