Duodenal switch is most efficient and result-proven technique of weight loss surgeries that combines both a sleeve gastrectomy and intestinal bypass. The stomach is reduced in 70% and then the first part of the intestine (duodenum) is divided and connected of the lower portion of the small intestine (ileum) Resulting in two thirds (or more) of the intestine bypassed and thus, leaving only a few feet of intestine where food and digestive enzymes meet. This technique has proven to give the best results for long-term weight stability.