In the case of men, uric acid 140.5 μmol/L has a slightly low level, and in the case of women, it generally falls within the normal range. Normal human blood uric acid level is 150~416μmol/L for men and 89~357μmol/L for women. There is a difference in the uric acid ranges for men and women, with the normal range for men being 150-416 μmol/L and for women 89-357 μmol/L. A uric acid level of 140.5 μmol/L is considered normal for women, but is slightly lower for men. If low uric acid is present, it may be caused by too little uric acid being produced or too much being excreted. Low uric acid levels can occur when a patient does not consume enough purines, such as a prolonged vegetarian diet or excessive dieting. Low uric acid levels may also occur in patients who overuse medications that excrete uric acid or who have abnormalities in renal tubular function. Patients can increase the intake of protein in moderation, if the low uric acid still persists after a well-balanced diet, it is recommended that patients go to the hospital for further examination to exclude organic lesions.