The study looked at how sleeve gastrectomy surgery affects the kidneys of rats with type 2 diabetes. They made the rats diabetic by giving them a high-fat diet and a drug. After the surgery, the diabetic rats had lower blood sugar levels and higher levels of a helpful hormone. The surgery also lowered markers of kidney problems like creatinine and microalbumin in the urine. The researchers found that the surgery reduced oxidative stress in the kidneys, which is good for kidney health. Therefore, sleeve gastrectomy may help kidney function in type 2 diabetes by decreasing oxidative stress.