Diet, HealthyNCT06842680
Testing Ultraprocessed Food Labels in Chile
A study testing Ultraprocessed warning label in people with Diet, Healthy, run by University of North Carolina, Chapel Hill at 1 site in United States.
Trial summary
The goal of this experiment is to examine the effects of a warning label signaling that a product is ultraprocessed among a sample of Chilean parents. The main questions this experiment aims to answer are: Do ultraprocessed warning labels on their own impact product purchase intentions? Do ultraprocessed warning… Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Diet, Healthy
- What is being tested?
- Ultraprocessed warning label
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 3,645 participants
- Where
- 1 siteUnited States
- Study dates
- 14 Jul 2025to 31 Aug 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- 18 years or older
- Parent or guardian of child between 2-14 years old who has never been diagnosed with diabetes, high blood sugar, pre-diabetes or insulin resistance
- Residing in Chile
Who cannot join
- Less than 18 years old
- Not parent or guardian of child between 2-14 years old who has never been diagnosed with diabetes, high blood sugar, pre-diabetes or insulin resistance
- Not residing in Chile
Trial locations and contacts
1 site in 1 country.
United States1 site
The University of North Carolina at Chapel Hill's Gillings School of Global Public Health
Chapel Hill, North Carolina, 27599
About this study
Official title: Evaluating the Effectiveness of an Ultraprocessed Food Warning Label in Chile
The goal of this experiment is to examine the effects of a warning label signaling that a product is ultraprocessed among a sample of Chilean parents. The main questions this experiment aims to answer are:
Do ultraprocessed warning labels on their own impact product purchase intentions?
Read more
Do ultraprocessed warning labels impact product purchase intentions in the presence of nutrient warning labels?
Do ultraprocessed warning labels help more consumers identify ultraprocessed foods?
Participants will be randomly assigned to a control arm or an ultraprocessed warning label arm. In both arms, products will carry nutrient warning labels, which are Chile's current policy. Participants will see three similar products, all of which will be ultraprocessed: one not high in any nutrients of concern, one high in sodium, and one high in sodium and saturated fat. For each product, participants will rate their purchase intentions and indicate whether they believe the product to be ultraprocessed. Researchers will compare results across arms.
Read the detailed description
Participants will complete an online randomized experiment programmed in Qualtrics. After providing informed consent, participants will be randomly assigned to one of two arms: control (i.e., no ultraprocessed warning label) arm or ultraprocessed warning label arm. In both arms, products will carry nutrient warning labels, which are Chile's current policy.
In random order, participants will see three similar mock bags of potato chips. All products seen will be ultraprocessed, and thus carry an ultraprocessed warning label in the ultraprocessed warning label arm. Additionally, one of the products will not be high in any nutrients of concern, one product will be high in sodium, and one product will be high in sodium and saturated fat. For each product, participants will rate their purchase intentions, perceived healthfulness, and indicate whether they believe the product to be ultraprocessed.
- Conditions
- Diet, Healthy
- Being tested
- Control, Ultraprocessed warning label
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ControlBehavioural
Products do not carry ultraprocessed warning label. To match the current Chilean legislation, products carry octagonal nutrient labels when applicable.
Ultraprocessed warning labelBehavioural
Products carry ultraprocessed warning label. To match the current Chilean legislation, products carry octagonal nutrient labels when applicable.
| Study group | Role | What they receive |
|---|---|---|
| Control | Active comparator | Not described Receives: Behavioral: Control |
| Ultraprocessed warning label | Experimental | Not described Receives: Behavioral: Ultraprocessed warning label |
What is being measured
The primary outcome is the main question the study is designed to answer.
Purchase intentions, mean score
How likely the participant would be to buy products will be measured by survey. Response options will be on a 5-point scale from "very unlikely" (coded as 1) to "very likely" (coded as 5), with higher scores representing a higher likelihood of buying products.
Measured: During exposure to intervention (i.e., study stimuli), assessed during one-time online 10-minute survey.
Correct identification of products as ultraprocessed
Correct identification of products as ultraprocessed will be measured by survey. Response will be coded in a dichotomous 0-1 range, where 1 indicates that the participant correctly identified the products as ultraprocessed and 0 indicates that the participant did not correctly identify the products as ultraprocessed.
Measured: During exposure to intervention (i.e., study stimuli), assessed during one-time online 10-minute survey.
Secondary outcomes (1)
Perceived product healthfulness, mean score
How good or bad it would be to consume the product every day will be measured by survey. Response options will be on a 5-point scale from "very bad" (coded as 1) to "very good" (coded as 5), with higher scores representing a higher perceived product healthfulness.
Measured: During exposure to intervention (i.e., study stimuli), assessed during one-time online 10-minute survey.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Feb 2025
- Study start14 Jul 2025
- Primary completion31 Aug 2025
- Study completion31 Aug 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Diet, HealthyStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 3,645 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of North Carolina, Chapel Hill
- Sponsor type
- University, hospital or other
- Collaborators
- Instituto de Nutrición y Tecnología de los Alimentos, Bloomberg Philanthropies
- Responsible party
- Sponsor
- Investigators
- Aline D'Angelo Campos, MPP, Principal investigator, University of North Carolina, Chapel Hill
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06842680
- Sponsor's protocol ID
- 24-2896b
- Status last verified
- Apr 2025
- First submitted
- 18 Feb 2025
- Last updated
- 9 Sep 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: The Study Protocol and Statistical Analysis Plan will be shared prior to data collection. After data collection and analysis, a de-identified version of individual participant data and the analytic code will be shared through the Open Science Framework (OSF).
Study at a glance
From the registry record, last updated by the sponsor on 9 Sep 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluating the Effectiveness of an Ultraprocessed Food Warning Label in Chile
- ClinicalTrials.gov ID
- NCT06842680
- Acronym / sponsor ID
- 24-2896b
- Conditions
- Diet, Healthy
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 3,645 participants (actual)
- Lead sponsor
- University of North Carolina, Chapel HillUniversity, hospital or other
- Collaborators
- Instituto de Nutrición y Tecnología de los Alimentos, Bloomberg Philanthropies
- Study start
- 14 Jul 2025 (actual)
- Primary completion
- 31 Aug 2025 (actual)
- Study completion
- 31 Aug 2025 (actual)
- First posted
- 24 Feb 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The goal of this experiment is to examine the effects of a warning label signaling that a product is ultraprocessed among a sample of Chilean parents. The main questions this experiment aims to answer are:
Do ultraprocessed warning labels on their own impact product purchase intentions?
Do ultraprocessed warning labels impact product purchase intentions in the presence of nutrient warning labels?
Do ultraprocessed warning labels help more consumers identify ultraprocessed foods?
Participants will be randomly assigned to a control arm or an ultraprocessed warning label arm. In both arms, products will carry nutrient warning labels, which are Chile's current policy. Participants will see three similar products, all of which will be ultraprocessed: one not high in any nutrients of concern, one high in sodium, and one high in sodium and saturated fat. For each product, participants will rate their purchase intentions and indicate whether they believe the product to be ultraprocessed. Researchers will compare results across arms.
Detailed description
Participants will complete an online randomized experiment programmed in Qualtrics. After providing informed consent, participants will be randomly assigned to one of two arms: control (i.e., no ultraprocessed warning label) arm or ultraprocessed warning label arm. In both arms, products will carry nutrient warning labels, which are Chile's current policy.
In random order, participants will see three similar mock bags of potato chips. All products seen will be ultraprocessed, and thus carry an ultraprocessed warning label in the ultraprocessed warning label arm. Additionally, one of the products will not be high in any nutrients of concern, one product will be high in sodium, and one product will be high in sodium and saturated fat. For each product, participants will rate their purchase intentions, perceived healthfulness, and indicate whether they believe the product to be ultraprocessed.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Control | Active comparator | Behavioral: Control |
| Ultraprocessed warning label | Experimental | Behavioral: Ultraprocessed warning label |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- 18 years or older
- Parent or guardian of child between 2-14 years old who has never been diagnosed with diabetes, high blood sugar, pre-diabetes or insulin resistance
- Residing in Chile
Key exclusion criteria (3 listed)
- Less than 18 years old
- Not parent or guardian of child between 2-14 years old who has never been diagnosed with diabetes, high blood sugar, pre-diabetes or insulin resistance
- Not residing in Chile
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| ControlProducts do not carry ultraprocessed warning label. To match the current Chilean legislation, products carry octagonal nutrient labels when applicable. | Behavioural | Control |
| Ultraprocessed warning labelProducts carry ultraprocessed warning label. To match the current Chilean legislation, products carry octagonal nutrient labels when applicable. | Behavioural | Ultraprocessed warning label |
Primary outcome
Purchase intentions, mean score
Time frame: During exposure to intervention (i.e., study stimuli), assessed during one-time online 10-minute survey.
How likely the participant would be to buy products will be measured by survey. Response options will be on a 5-point scale from "very unlikely" (coded as 1) to "very likely" (coded as 5), with higher scores representing a higher likelihood of buying products.
Correct identification of products as ultraprocessed
Time frame: During exposure to intervention (i.e., study stimuli), assessed during one-time online 10-minute survey.
Correct identification of products as ultraprocessed will be measured by survey. Response will be coded in a dichotomous 0-1 range, where 1 indicates that the participant correctly identified the products as ultraprocessed and 0 indicates that the participant did not correctly identify the products as ultraprocessed.
1 secondary outcome
Perceived product healthfulness, mean score
Time frame: During exposure to intervention (i.e., study stimuli), assessed during one-time online 10-minute survey.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 9 Sep 2025.
- Individual participant dataSharing planned: Yes. The Study Protocol and Statistical Analysis Plan will be shared prior to data collection. After data collection and analysis, a de-identified version of individual participant data and the analytic code will be shared through the Open Science Framework (OSF).
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Aline D'Angelo Campos, MPP principal investigator
University of North Carolina, Chapel Hill
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Ultraprocessed warning label in people with Diet, Healthy, run by University of North Carolina, Chapel Hill at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 9 Sep 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Purchase intentions, mean score (time frame: During exposure to intervention (i.e., study stimuli), assessed during one-time online 10-minute survey.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Sep 2025; AzTrials last refreshed its copy on 30 Oct 2026.