Certain medication or hormone preparations that either intervene with the menstrual cycle or change the secretion of saliva, as well as acute inflammations in the oral cavity or in the throat as well as salivary gland diseases can temporarily change the composition of the saliva and thus influence the result.
External influences such as drinking, eating, brushing teeth, rinsing the oral cavity, as well as smoking can falsify the result of the test. That's why the Geratherm® ovu control should be used no earlier than 3 hours after that.
Furthermore, the sample may be impaired when used outdoors, as direct sunlight could blind the display of the sample. For this reason, you should only use the test indoors and avoid bright ambient light.