Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. If your doctor feels that bypass is the best option for you then you need to go for it. I will tell you some of the basic differences which can make things clear to you. Bypass is obviously a little more sophisticated procedure as you know, but make give you better results in the end. 1. How they work: Both make you feel full sooner while eating. Only sleeve makes you feel less hungry generally, and only bypass reduces the amount of minerals your body absorbs. 2. Qualify: Same requirements (30+ BMI with health problems, 40+ without). 3. Hospital & recovery: Sleeve is a less complicated procedure with a shorter operating time. In-hospital and post-op recovery is similar. Weight loss & health improvement: Similar at 2 years post-op, but bypass patients tend to keep more weight off over the long-term. 4. Insurance: Same (if your policy covers bariatric surgery, both sleeve and bypass will be covered). 5. Cost: Same with insurance, bypass is about 25% more expensive without insurance. 6. Diet & life after: Similar diet and exercise regimen, but bypass requires stricter supplementation and vitamin level monitoring. 7. Complications & side effects: Both have a 99.8% survival rate. Bypass has a higher risk of complications and side effects. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr Sanjay Kini