About this trial
This study aims to evaluate whether a dual-label intervention, combining carbon -coded footprint color labels and calorie information, can promote low-carbon and healthier food choices among university students in a real-world cafeteria setting. A randomized controlled trial will be conducted with approximately 200 participants, who will be assigned to either an intervention group (with labels) or a control group (without labels). The study a consists of 2-week baseline period, a 4-week intervention period, and a 2-week a follow-up period. The primary outcome is the mean carbon footprint level of selected meals, and secondary outcomes include nutritional quality, body composition, and changes in environmental and health awareness.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Students enrolled at the university
Regularly purchase food in the university cafeteria
Aged ≥18 years
Disqualifiers
Individuals aged <18 years
Individuals who do not regularly purchase food in the university cafeteria
Individuals unable to participate throughout the study period
Trial design
Parallel
Treatments tested in this trial
Carbon and Calorie label
BehavioralParticipants are exposed to carbon footprint and calorie information presented on labels attached to serving trays in a university cafeteria. The labels use visual cues (e.g., traffic-light colors) to indicate environmental impact and energy content of food items at the point of selection.
Treatment groups
Trial outcomes
Primary outcomes
Carbon footprint of selected food items
Average carbon footprint of food items selected per participant in a university cafeteria setting, calculated based on carbon emission values and compared between intervention and control groups.
Secondary outcomes
Calorie content of selected food items
Average calorie content (kcal) of food items selected per participant in a university cafeteria setting, compared between intervention and control groups.
Nutritional quality score of selected food items
utritional quality score of food items selected per participant in a university cafeteria setting, assessed using a predefined scoring system and compared between groups.
Body mass index
Change in body mass index (kg/m²) from baseline to 4 weeks among participants.
Body weight
Change in body weight (kg) from baseline to 4 weeks among participants.
Sponsors and contacts
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Lina Zhang
Lead sponsor
Zhejiang Chinese Medical University
Sponsor institution
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