Gastric sleeve surgery, also known as sleeve gastrectomy, is the most popular bariatric procedure worldwide and at Istanbul Bariatric Center. Dr. Murat Üstün performs this laparoscopic procedure at Liv Hospital Vadistanbul, removing approximately 80% of the stomach to create a sleeve-shaped pouch. This reduces food intake and decreases hunger hormones, leading to significant and sustained weight loss. Patients typically lose 60-70% of excess weight within the first year.