Weight Loss Interventions for Obesity

In Singapore, the widespread availability of local meals and concerns of overconsumption due to a lack of internal self-regulation skills for hunger predisposes an increased energy intake. Furthermore, a lack of time, motivation, and self-efficacy in preparing healthy meals may potentially limit the extent of weight and dietary management among local individuals with obesity.

The ketogenic diet has consistently demonstrated beneficial effects on facilitating weight management. This weight loss mechanism involves achieving a calorie deficit, induced state of nutritional ketosis, and the reduction in appetite and hunger. Importantly, the weight loss achieved from the early phase of the intervention serves as one of the key enablers in the weight loss process. Despite these benefits, there is paucity in the literature examining the provision of healthy ketogenic ready-to-eat (HK-RTE) meals on weight loss. Furthermore, none of these studies explored the extent of motivation derived from the benefits of these meals, nor included the use of mHealth self-monitoring strategies to encourage weight loss.

To address the research gap, our study aims to evaluate the effectiveness of HK-RTE meals with mHealth app, as compared to healthy ketogenic diet (HKD) (without meal provision) using the mHealth app on weight loss and metabolic outcomes among Asian individuals with obesity.

In this randomized controlled trial, participants will be randomized to either HK-RTE group or the HKD group using computer-generated random sequencing. Both groups will receive nutrition education conducted by dietitians throughout the 6-month study period (total of 5 dietary workshops covering topics such as ketogenic dietary advice and self-monitoring habits).

The HK-RTE group will be provided with HK-RTE meals for lunch and dinner in the first month (n = 25). They are to take these meals as part of a healthy ketogenic diet, with a maximum of 50g net total carbohydrates daily. Those in the control group will be advised to follow a healthy ketogenic diet (HKD) without the RTE meals (n = 25) and similarly to keep to a maximum of 50g net carbohydrates daily. Participants will also be encouraged to use the Nutritionist Buddy (nBuddy) mobile application to facilitate monitoring of diet intake, physical activity and weight throughout the 6-month study period. The impact of the HK-RTE meals on motivation and appetite regulation in influencing weight loss will also be explored.