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Will warning labels on junk food change what you buy?

NCT ID NCT07533877

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 adding a warning label to ultra-processed foods (like sugary yogurts) changes what people say they would buy. Over 7,000 U.S. adults viewed mock food packages online with or without a warning label. Researchers measured purchase intent and how healthy people thought the products were.

What this could mean

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

Active substance
ultra-processed food warning label
What this could lead to
If effective, these labels could help people make healthier food choices and inform future FDA nutrition labeling policies.
What could go wrong
This was an online experiment with mock products, not a real shopping setting. Actual behavior may differ, and the impact on long-term diet or health is unknown.

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

7,000 people

The number who actually took part.

Started

Apr 2026

Finished

May 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 years and older

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: * 18 years of age or older * Member of the Verasight Panel * Residing in the United States Exclusion Criteria: * \<18 years of age * Not residing in the United States * Completed the survey in less than one-third of the median completion duration of all participants * Respondents with high refusal rates (skipped or refused more than 50% of questions) * Respondents who 'straight-line' all question grids with 6 or more items, where responses are not internally consistent

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Conditions

The condition(s) this trial relates to.

Consumer Behavior

As listed by the trial registrant

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

Contacts and locations

Locations

  • Johns Hopkins Bloomberg School of Public Health

    Baltimore, Maryland, 21205, United States

More trials for these conditions

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