The gastric sleeve is a type of weight-loss surgery that involves removing a large portion of the stomach, leaving a tube-like structure. This smaller stomach can hold less food, which helps patients feel full sooner and reduces overall calorie intake. The procedure is typically performed laparoscopically, meaning it uses small incisions and specialized instruments. After the surgery, patients often experience significant weight loss and improvements in obesity-related health conditions, such as type 2 diabetes and high blood pressure. However, it requires a commitment to lifestyle changes, including a healthy diet and regular exercise, to maintain long-term results.