Research
Mixed
Bariatric surgery (specifically Roux-en-Y gastric bypass) provides the greatest long-term weight loss and diabetes remission rates compared to other surgical and non-surgical interventions.
For severe obesity (BMI >40 or >35 with health issues), surgery is the most effective long-term solution. Roux-en-Y bypass offers the best results for weight loss and diabetes remission. It requires lifelong vitamin supplements and lifestyle changes, but offers the highest chance of sustained health improvement.
StrongSupportsVERY_HIGH confidence
Roux-en-Y bypass surgery resulting in the greatest weight loss compared with gastric banding and sleeve gastrectomy... Diabetes remission (72% for RYGB vs 33% for Banding, 70% for Sleeve).
Why this rating
Supported by 20-year follow-up of the Swedish Obese Subjects (SOS) study.
Source
Medical management of obesity
Sheena Gupta et al. · Clinical Medicine · 2023
DOI 10.7861/clinmed.2023-0183
narrative_reviewCited 10×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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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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