Ascorbic acid is also known as vitamin C. Ascorbic acid 1+ means a higher than normal level of vitamin C in the urine routine. Vitamin C is a water-soluble vitamin and is excreted through the urine, hence the presence of vitamin C in the urine. If ascorbic acid (+) is present, there is no need to worry too much and usually no special treatment is needed. You can promote the excretion of vitamin C by drinking more water. There is no specific clinicopathological significance to the ascorbic acid (+) test result. The purpose of the vitamin C test is to exclude confounding factors in the urine that may affect the test result and to avoid false-positive or false-negative results. For example, a routine urine test performed in the presence of a urinary tract infection may show an expression of nitrite (+). The main reason for this is that the presence of a large number of bacteria in the urine can convert the nitrate in the urine into nitrite, resulting in a positive expression of nitrite in the urine. However, if vitamin C is also present in the urine, this can interfere with the normal result and result in a negative nitrite expression, which is called a false negative expression. Another situation is that in urine glucose testing, a diabetic patient may have a positive urine glucose expression. However, the presence of vitamin C in the urine, even in normal people, can lead to a positive Bancroftian qualitative test, i.e., a positive expression due to the presence of vitamin C despite normal urine sugar, which is also called a false positive expression. Therefore, the main purpose of the vitamin C test in urine is to rule out false negatives or false positives in urine test results. At the same time, in specific cases, it needs to be analyzed and judged in conjunction with the clinical manifestations of the patient to avoid misdiagnosis.