Currently, nucleic acid testing is generally referred to as the New Crown Nucleic Acid Test, and current clinical and relevant research has shown that diet does not affect nucleic acid test results. It has not been found that eating certain foods prior to the nucleic acid test will result in a positive result, but it is recommended that no food be eaten within 2 hours prior to the nucleic acid test, that no large amounts of water be consumed half an hour beforehand, especially carbonated beverages, alcohol, etc. and it is recommended that no cigarettes be smoked or gum chewed in order to avoid discomfort during the sampling process. Nucleic acid testing is currently used to check for the presence of new coronavirus infections, mostly by taking a throat swab or nasal swab. Before the test, it is necessary to maintain oral and nasal hygiene, relax, and wear a mask. There are also other tests such as sputum, genital secretions, blood, feces, urine, etc. The precautions are not exactly the same, so it is advisable to consult your doctor or testing organization in advance.