Energy balance

Roux-en-Y gastric bypass surgery induces significantly higher postprandial energy expenditure and 24-hour total energy expenditure compared to vertical banded gastroplasty (VBG) in weight-stable patients, despite similar body composition and caloric intake.

This research suggests that Roux-en-Y gastric bypass surgery alters metabolism to burn more calories after meals compared to other restrictive surgeries like VBG, even when patients eat the same amount and have similar body composition. This increased energy expenditure may be a key reason why gastric bypass leads to better long-term weight loss maintenance. For non-surgical approaches, mimicking these metabolic changes (e.g., through gut hormone modulation) could be a promising strategy.