Comparing Ready-to-Eat Very Low Calorie Diet Meals and Liquid Meal Replacement for Pre-Bariatric Surgery Weight Loss

What this Trial Is About

The rising obesity rates, including in Singapore, have increased the need for effective weight loss methods before bariatric surgery to reduce surgical risks and complications. This trial evaluates whether ready-to-eat Very Low Calorie Diet VLCD meals improve patient compliance and satisfaction compared to the standard liquid meal replacement used for preoperative dietary management. The study focuses on patients preparing for bariatric surgery, aiming to enhance adherence through more appealing meal options. Participants are randomly assigned to one of two groups the standard care group receives liquid meal replacements for all meals over 4 weeks, while the intervention group receives VLCD ready-to-eat meals for lunch and dinner plus advice on a ketogenic breakfast. Both groups follow a diet limited to 800 calories and 50 grams of net carbohydrates daily. They use the Nutritionist Buddy Keto app to log meals, weight, and physical activity, receiving virtual reminders and dietitian support throughout the intervention. During the study, participants self-monitor their compliance via the app, with blood ketone levels measured weekly and on surgery day to assess adherence. Researchers also track meal satisfaction and weight changes over the 4-week period. The study aims to determine if the ready-to-eat meals lead to better compliance, as indicated by app logs and ketone measurements, ultimately supporting improved preoperative weight loss. Total participation lasts about one month before surgery.

Compliance With Standard Care vs Ready to Eat Meals Prior to Bariatric Surgery