Ascorbic acid

All information on ascorbic acid

At a glance

Ascorbic acid (also called vitamin C) is an important building block for numerous metabolic functions in the human body and plays an important role in improving the immune system.

Ascorbic acid is found in all people in the urine as soon as vitamin C-containing fruits, vegetables, juices, sweets, tablets or the like have been taken.

For more information

In the urine test, ascorbic acid is tested only because the acid can permanently disturb the result of other parameters. For example, that of blood and sugar. Ascorbic acid prevents the oxidation of indicator substances in urine test strips and partly leads to false-negative results.

It can be assumed that more than 20 of all urine samples may have an ascorbic acid concentration in the urine, which leads to a disturbance of the test fields. A false-negative test result may detect diseases too late and delay the initiating therapies.

Many manufacturers advertise a de-interference of their test strips against ascorbic acid. Others add a field to the test strips to measure ascorbic acid. As soon as this indicates a threshold, the test should be repeated as a matter of urgency.


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Status of information: Autumn 2019