Research
Mixed
Roux-en-Y gastric bypass (RYGB) results in greater weight loss and glycemic improvement compared to laparoscopic adjustable gastric banding (LAGB) and lifestyle intervention alone.
If choosing between surgical options for obesity and Type 2 Diabetes, Roux-en-Y gastric bypass (RYGB) provides greater weight loss and better glycemic control than laparoscopic adjustable gastric banding (LAGB). While LAGB is less invasive and reversible, RYGB is more effective for achieving remission and significant weight reduction.
GoodSupportsHIGH confidence
Mean (SE) reductions in percentage of body weight at 3 years were the greatest after RYGB at 25.0% (2.0%), followed by LAGB at 15.0% (2.0%) and lifestyle treatment at 5.7% (2.4%) (P < .01).
Why this rating
RCT with 3-year follow-up, small sample size.
Source
Three-Year Outcomes of Bariatric Surgery vs Lifestyle Intervention for Type 2 Diabetes Mellitus Treatment
Anita P. Courcoulas et al. · JAMA Surgery · 2015
DOI 10.1001/jamasurg.2015.1534
rct · n=61Cited 366×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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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