Metabolic Surgery is the term used to describe surgical procedures to treat metabolic diseases, especially, type 2 diabetes, dyslipidemia, and Insulin Resistance. Sleeve gastrectomy with Loop Duodenojejunal Bypass (LDJB-SG) is a relatively new procedure. The pyloric preserving mechanism could decrease the incidence of dumping syndrome. Also, the mixture of alkaline bile and pancreatic enzyme with gastric acid around anastomosis also decrease the incidence of the marginal ulcer. The acid and intrinsic factor secretion would be maintained. Thus, iron, vitamin, and protein deficiency should be less because some part of antrum is preserved