In asymptomatic patients with hyperuricemia, the normal value of uric acid should be controlled below 420 μ mol/L (7 mg/dl) for men and below 360 μ mol/L (6 mg/dl) for women. In patients with recurrent nephropathy, the normal value of uric acid should be controlled at a low level, such as below 300 micromole/liter (5 mg/dl).