Weight loss surgery, also known as bariatric surgery, is a medical procedure designed to help individuals with obesity lose weight. It involves altering the digestive system to limit food intake or reduce nutrient absorption. Common types of weight loss surgery include gastric bypass, sleeve gastrectomy, and adjustable gastric banding. Candidates for weight loss surgery typically have a body mass index (BMI) of 40 or higher, or a BMI of 35 with obesity-related health issues. This surgery can lead to significant weight loss and improve conditions such as type 2 diabetes, hypertension, and sleep apnea. However, it requires a commitment to lifestyle changes for long-term success.