The duodenal switch and gastric bypass both have restrictive and malabsorptive components in which a new connection between the stomach and small intestine is surgically created. The duodenal switch has a higher level of malabsorption. This malabsorption leads to a higher level of weight loss (85% of excess weight loss) and better sustainability of the weight loss. This procedure is ideal for patients with and high BMI and other medical issues related to obesity.