Urine test vitamins a plus and a minus, suggests that the urine test vitamins are weakly positive, in the urine has no practical significance, but only as a reference to compare the index exists, suggesting the presence of excessive vitamin content in the urine. If the diet contains vitamins of food, fruit eating too much, there will be a higher level of vitamins in the urine, a positive result. Weak positivity suggests that the criteria for positivity have not yet been met, but are still above normal. Vitamin C serves as a contrast to vitamin C when there is a positive urine nitrite, or when there is a positive occult blood, because elevated vitamin C can reduce urine nitrites to positive, and it can also reduce occult blood to positive, leading to a false positive result. So as a contrast agent present in the urine routine, there is no practical significance, but only as a reference comparison of other positive indicators to rule out false-positive results.