Bariatric surgery causes significant changes in gastrointestinal and pancreatic peptide hormones, contributing to improved glucose tolerance and weight loss.

Surgical procedures like gastric bypass modify hormone levels including GLP-1, peptide YY, ghrelin, and insulin. These changes alter appetite control, digestion, and metabolism, which play a major role in the surgery’s success for obesity and type 2 diabetes remission. The interplay of these peptides highlights their critical function in regulating energy balance and glucose homeostasis.