My Sister Has to Choose Between Sleeve Gastrectomy or Gastric Bypass Surgery, Her BMI is About 43?

the doctor has suggested either of the two. but i have 2 concerns...... 1. if the stomach lies intact in the body after being bypassed in gastric bypass surgery, the normal enzyme and hormone secretions will continue but not utilized.will it not be harmful 2. i have heard that any eating problem after gastric bypass requires a visit to hospital to rectify whereas in sleeve just vomit and homecare is sufficient? req. urgent guidance.thanks

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