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Updated: Jul 5, 2025

Roux-en-Y Gastric Bypass Operation in Rats
Published on: June 11, 2012
Post metabolic bariatric surgery weight regain: the importance of GLP-1 levels
Nursel Çalık Başaran1, Idit Dotan2,3, Dror Dicker3,4
1Hacettepe University, Faculty of Medicine, Department of Internal Medicine, General Internal Medicine, Ankara, Türkiye. nurselcbasaran@gmail.com.
Abstract:
Weight regain and insufficient weight loss are essential problems after metabolic bariatric surgery (MBS) in people living with obesity. Changes in the level of glucagon-like peptide-1 (GLP-1) secreted from the gut after bariatric surgery are one of the underlying mechanisms for successful initial weight loss. Studies and meta-analyses have revealed that postprandial GLP-1 levels increase after the Roux-en-Y gastric bypass and sleeve gastrectomy, but fasting GLP-1 levels do not increase significantly. Some observational studies have shown the relationship between higher postprandial GLP-1 levels and successful weight loss after bariatric surgery. There is growing evidence that GLP-1-receptor agonist (GLP-1-RA) use in patients who regained weight after bariatric surgery has resulted in significant weight loss. In this review, we aimed to summarize the changes in endogenous GLP-1 levels and their association with weight loss after MBS, describe the effects of GLP-1-RA use on weight loss after MBS, and emphasize metabolic adaptations in light of the recent literature. We hypothesized that maintaining higher basal-bolus GLP-1-RA levels may be a promising treatment choice in people with obesity who failed to lose weight after bariatric surgery.
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