A mildly high glomerular filtration rate of 126 ml/min may be due to physiologic or pathologic causes. Glomerular filtration rate is the amount of plasma fluid filtered out through the glomerulus per unit of time (minute), i.e., the amount of ultrafiltrate produced by the kidneys on both sides per unit of time (minute). Glomerular filtration rate cannot be directly measured clinically at present, but can only be inferred by the renal clearance or plasma clearance of some marker. Under normal circumstances, the glomerular filtration rate is usually between 80 and 120 ml/min, so a test result of 126 ml/min is a mildly high glomerular filtration rate. It may be caused by physiological factors such as high protein diet, pregnancy, etc., or pathologic factors such as the early stage of diabetic nephropathy that lead to its elevation. Glomerular filtration rate can help to measure whether the kidney function is normal or not, if this index is abnormal, it is recommended that the patient go to a regular hospital in time, under the guidance of the doctor to give targeted treatment or therapy.