Gastric bypass surgery, specifically the Roux-en-Y procedure, is one of the most effective bariatric operations for long-term weight loss and type 2 diabetes remission. Performed by Dr. Murat Üstün at Liv Hospital Vadistanbul, this procedure creates a small stomach pouch and reroutes the small intestine, reducing both food intake and calorie absorption. Patients typically lose 70-80% of excess weight and experience significant improvement in obesity-related health conditions.