Background: Obese persons may suffer from peripheral obesity with joint disease and venous stasis or central obesity that predisposes to a number of mortality-related problems due to the metabolic syndrome. Obesity is classified into: overweight, obesity class one, moderate obesity class two, morbid obesity, and super morbid obesity according to the body mass index (BMI). Extensive metabolic changes accompany bariatric surgery-based treatment of obesity. Consequently, the term “metabolic" surgery is being increasingly adopted in relation to the beneficial effects these procedures have on chronic diseases like type 2 diabetes. Objectives: Discussing metabolic changes that occur in the body after bariatric surgeries. Conclusion: Metabolic surgery achieves and sustains improvements in metabolic dysfunction secondary to obesity. Further mechanistic studies are essential to assess the true potential of metabolic surgery to treat the myriad other disorders of metabolism and their consequences in terms of cardiovascular disease and cancer.