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OpenTrials
Completed

NCT Number: NCT05842460

Testing "Ultraprocessed" Front-of-package Label Among Brazilian Consumers

The goal of this experiment is to test the effects an "ultraprocessed" warning label on foods and beverages among Brazilian consumers. The main questions it aims to answer are:

* Do "ultraprocessed" warnings affect Brazilian consumers' intention to purchase products? * Do "ultraprocessed" warnings affect Brazilian consumers' product perceptions?

Participants will see images of four products carrying either nutrient warning labels (which are currently mandatory in Brazil) or nutrient warning labels alongside an experimental warning label informing that the product is ultraprocessed. Participants will then answer survey questions about each product. Researchers will compare responses between both arms to determine if the "ultraprocessed" warning significantly changes the effect of nutrient warnings.

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Key information

Conditions

Dietary Exposure

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University of North Carolina at Chapel Hill

Chapel Hill, North Carolina, 27516, United States

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • 18 years or older,
  • residing in Brazil,
  • responsible for at least 50% of the household's grocery purchases.

Exclusion criteria

  • involvement in any pre-testing.

Treatment and study plan

Nutrient warning labels

Behavioral

Inclusion of nutrient warning labels, which are currently mandatory in Brazil, to images of food products.

Nutrient and ultraprocessed warning labels

Behavioral

Inclusion of nutrient warning labels, which are currently mandatory in Brazil, and an experimental ultraprocessed warning label to images of food products.

Primary outcomes

  1. Purchase intentions

    Time frame: Online survey within 20 minutes following completion of a ~10 minute shopping task.

    How likely the participant would be to buy products will be measured by survey. Response options are on a 1 to 5 scale, with higher scores representing a higher likelihood of buying products.

Secondary outcomes

  1. Product healthfulness perceptions

    Time frame: Online survey within 20 minutes following completion of a ~10 minute shopping task.

    How healthy products seem to the participant will be measured by survey. Response options are on a 1 to 5 scale, with higher scores representing a higher perceived product healthfulness.

  2. Product processing status perceptions

    Time frame: Online survey within 20 minutes following completion of a ~10 minute shopping task.

    Whether the participant believes products are ultraprocessed will be measured by survey. Responses options are "no," "yes," and "I'm not sure."

  3. Message effectiveness perceptions

    Time frame: Online survey within 20 minutes following completion of a ~10 minute shopping task.

    Perceived message effectiveness of the study labels will be measured by survey through a three-item scale. Items inquire about how much the labels discourage the participant from wanting to consume the products, how much the labels make the participant concerned about the health effects of consuming the products, and how much the labels make consuming the products seem unpleasant. Response options are on a 1 to 5 scale, with higher scores representing a higher perceived message effectiveness of the study labels.

Sponsors and collaborators

Lead sponsor

University of North Carolina, Chapel Hill

Other

Collaborators

  • The Bloomberg Family Foundation, Inc.

Registry information

Official study title

Testing the Impact of an "Ultraprocessed" Front-of-package Warning Label Among Brazilian Consumers

Important dates

Study start
2023
Primary completion
2023
Study completion
2023
First posted
May 6, 2023
Registry last updated
Aug 14, 2023

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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