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Ultra-processed Food Reducing Intervention and Continuous Glucose Monitoring
Sponsor: Korea University
Summary
The goal of this trial is to investigate whether reduction in ultra-processed food intake through diet counseling and education can improve postprandial glucose levels and glycemic variability among Korean healthy adults aged 20-30 years. The main questions it aims to answer are: * Does the reduction in ultra-processed food intake lower postprandial glucose levels and glycemic variability in healthy adults without a history of diabetes? * Does the reduced intake in different ultra-processed food subgroups and items differentially influence postprandial glucose and glycemic variability? * Does other dietary and lifestyle factors (physical activity, sleep, smoking) alter the association between ultra-processed food intake reduction and glycemic variability? Participants will: * Undergo the 10-day pre-intervention monitoring period, during which each participant will wear a continuous glucose monitoring (CGM) device and concurrently report their daily dietary intakes (all food and beverage consumptions) and other lifestyle behaviors (sleep, smoking, physical activity) * After the 10-day pre-intervention monitoring period, participants will be randomized to either intervention or control group * Intervention group: Participants will visit the research site to receive dietitian-led nutrition education and personalized diet counseling targeting reduction of ultra-processed food intake, as well as improving diet quality. Personalized diet counseling will be provided by study dietitian based on participant's records of dietary intakes during the 10-day pre-intervention monitoring period. * Control group: Participants will receive dietitian-led nutrition education and personalized diet counseling targeting general improvement in nutrient intake (based on the national dietary guidelines). * After the intervention, participants will undergo the 10-day post-intervention monitoring period, during which participants will wear a new CGM device for an additional 10 days and continue daily reporting of dietary intakes (all food and beverage consumptions) and lifestyle behaviors (sleep, smoking, physical activity).
Official title: A Randomized Trial of Ultra-processed Food Reducing Intervention for Postprandial Glucose and Glycemic Variability Control: Continuous Glucose Monitoring-assisted Investigation Among Korean Adults
Key Details
Gender
All
Age Range
20 Years - 39 Years
Study Type
INTERVENTIONAL
Enrollment
40
Start Date
2025-10-01
Completion Date
2026-08-31
Last Updated
2025-09-16
Healthy Volunteers
Yes
Conditions
Interventions
Behavioral: Nutritional education and diet counselling
All participants will be asked to visit the study site after the 10-day baseline monitoring period. They will receive a 30-minute nutrition education focusing on reducing UPF intake; and personalized counselling session based on their dietary intake observed during the baseline monitoring period. Participants allocated to the intervention group will receive nutrition education and personalized counselling aimed at reducing ultra-processed food (UPF) intake by encouraging the substitution of UPFs with unprocessed/minimally processed foods, thereby improving overall diet quality. Participants will be educated on the definition of UPFs, how to identify them, practical strategies for reducing UPF intake, UPF-reducing recipes, and the associations between UPF intake and health outcomes. The content related to UPFs was developed based on previous studies exploring the health effects of UPF intake, while the content on diet quality was based on the 2020 Korean Dietary Reference Intakes.
Conventional nutrition education and diet counseling
All participants will be asked to visit the study site after the 10-day baseline monitoring period. Participants in the control group will receive a conventional nutrient-based education and personalized diet counseling developed based on the 2020 Korean Dietary Reference Intakes.
Locations (1)
Health Promotion Lab, College of Health Science, Korea University
Seoul, Seoul, South Korea