Clinical Research Directory

Ultra-processed Food Reducing Intervention and Continuous Glucose Monitoring

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).

Analysis of Changes in Blood Glucose Spinal Epidural Nerve Block with Steroids in Patients with Low Back Pain

This study aims to investigate the effect of different doses of dexamethasone used in epidural nerve block procedures on blood sugar levels. Patients with spinal conditions such as stenosis or disc herniation will be enrolled. Blood glucose and HbA1c levels will be measured before the procedure, and participants will use continuous glucose monitoring devices for 2-3 days before the procedure. They will be randomly assigned to one of three groups: no dexamethasone, 5mg dexamethasone, or 7.5mg dexamethasone. Blood glucose will be monitored for one week after the procedure, and follow-up will be done two weeks later to assess pain and blood sugar data. This study will help determine how steroid doses affect blood sugar, especially in elderly patients, and provide more accurate information than previous studies.