Because Clarian, as well as many other medical institutions, is undertaking a large endeavor to become a center of excellence in bariatric surgical treatment, the risk of stone formation and renal disease in these patients should be carefully examined. It is hoped that early recognition of adverse metabolic alterations will allow the patient and physician to rapidly treat and even prevent some complications. Loss of renal function, as with the previous experience with JIB, is much too late a phase in the consequences of hyperoxaluria for the identification of such problems associated with bariatric surgery. Patients can also be adequately counseled if they have a prior history of stone disease regarding the relative risks of the various bariatric surgical procedures. As obesity is currently an important national health issue, the examination of the surgical treatment for obesity and the consequences of these procedures is timely. Scrutiny of the risks of bariatric surgery will benefit both patient and surgeon in identify and preventing renal complications that may arise.