Mixed
Metabolic and bariatric surgery (MBS) provides significantly greater reduction in major adverse cardiovascular events (MACE) and all-cause mortality compared to GLP-1 receptor agonist (GLP-1 RA) therapy in patients with obesity and type 2 diabetes.
If you have obesity and type 2 diabetes, metabolic surgery (like gastric bypass or sleeve gastrectomy) is currently shown to be more effective than GLP-1 medications (like semaglutide or liraglutide) at preventing heart attacks, strokes, and death. While GLP-1 drugs are important for those who cannot have surgery, surgery offers greater long-term cardiovascular protection and more sustained weight loss, though it carries surgical risks and requires lifelong nutritional monitoring.
Pooled analysis of eligible studies suggested that MBS offered greater reductions in both MACE and all-cause mortality than GLP-1 RAs therapy. The relative risk reduction for MACE was approximately 52% in favor of MBS.
Why this rating
Moderate certainty by GRADE criteria, but includes observational cohorts and heterogeneity (I² = 78.3%).
Source
Efficacy of Metabolic and Bariatric Surgery Compared with GLP-1 Receptor Agonist Treatment in Preventing Mortality and Major Adverse Cardiac Events Among Individuals with Obesity and Type 2 Diabetes: A Systematic Review and Meta-analysis
Joshua Chadwick et al. · Obesity Surgery · 2026
DOI 10.1007/s11695-026-08508-5
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
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