From a recent Diabetes Care article:
Our data suggest robust benefits for renal outcomes, heart failure, and CV mortality after GBP in individuals with obesity and T2DM. These results suggest that marked weight loss yields important benefits, particularly on the cardiorenal axis (including slowing progression to end-stage renal disease), whatever the baseline renal function status.
Because of the risk of surgery, I’d make sure first that diet modification was seriously tried and failed.
Steve Parker, M.D.