An interventional study of Nutrient warning labels and Nutrient and ultraprocessed warning labels in Dietary Exposure, sponsored by University of North Carolina, Chapel Hill. Completed at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-08-14.
Sponsored by University of North Carolina, Chapel Hill · Not applicable, Interventional, and Prevention
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:
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.
University of North Carolina, Chapel Hill is the lead sponsor of 1,340 studies on the registry; 133 are open to participants now.
Of its 155 completed or terminated interventional studies of FDA-regulated products, 136 (88%) have results posted.
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Exclusion criteria:
Individuals in this trial arm will see images of products carrying nutrient warnings that are currently included in Brazil's front-of-package labeling scheme.
Behavioral: Nutrient warning labels
Individuals in this trial arm will see images of products carrying nutrient warnings that are currently included in Brazil's front-of-package labeling scheme and an experimental warning stating that the product is ultraprocessed.
Behavioral: Nutrient and ultraprocessed warning labels
Inclusion of nutrient warning labels, which are currently mandatory in Brazil, to images of food products.
Inclusion of nutrient warning labels, which are currently mandatory in Brazil, and an experimental ultraprocessed warning label to images of food products.
Purchase intentions
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.
Time frame: Online survey within 20 minutes following completion of a ~10 minute shopping task.
Product healthfulness perceptions
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.
Time frame: Online survey within 20 minutes following completion of a ~10 minute shopping task.
Product processing status perceptions
Whether the participant believes products are ultraprocessed will be measured by survey. Responses options are "no," "yes," and "I'm not sure."
Time frame: Online survey within 20 minutes following completion of a ~10 minute shopping task.
Message effectiveness perceptions
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.
Time frame: Online survey within 20 minutes following completion of a ~10 minute shopping task.
Documents are hosted by the registry — open the source record to download them.
Plan to share: Yes — A deidentified dataset and analytic code will be uploaded to a public repository upon publication of the study.
Supporting information: Analytic code
This study is completed, as verified in Aug 2023. You cannot join it, but the record below documents what was studied.
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University of North Carolina, Chapel Hill