Eating oranges does not usually have an effect on getting a nucleic acid test, but if the test is sampled from the throat, it is recommended that you do not eat anything two hours before the test is performed. Nucleic acid testing also detects the presence of specific gene fragments from specific pathogens, which are not present in foods not infected with such pathogens, so you can usually eat oranges or other foods prior to the nucleic acid test, and it usually does not affect the test results. It is important to note that if the pathogen being tested is viable in plants, animals, and other hosts, consumption is not recommended prior to testing. Specific requirements and precautions should be consulted in detail with the physician or medical staff at the testing site prior to performing the nucleic acid test so as not to affect the results. In addition, if the nucleic acid test collects samples in the throat, some patients may be more sensitive and have adverse reactions such as nausea and vomiting during the test, so in order to minimize the discomfort, it is recommended that you do not eat for two hours before the test. When doing the nucleic acid test, you must carefully cooperate with the doctor, the test results will be more accurate, if there is any abnormality in the test results, you need to actively cooperate with the doctor to adopt the appropriate treatment plan.