Eating gum before having a nucleic acid test may be problematic. Nucleic acid tests are collected through blood draws, throat swabs, nasal swabs, sputum, etc. If a throat swab is performed, chewing gum will secrete more saliva, which may dilute respiratory secretions and reduce virus density, affecting the accuracy of the test. If a blood test is performed, chewing gum may also affect the final test results. This is because when chewing gum is eaten, some substances are absorbed into the body’s bloodstream through digestion in the gastrointestinal tract, increasing the concentration of certain components in the bloodstream and thus affecting the accuracy of the test results. When nasal swabs are generally performed, chewing gum, on the other hand, does not have much of an effect, as chewing gum does not affect the secretions in the nasal passages. You should also try to avoid eating and refrain from eating spicy and stimulating foods before doing the nucleic acid test, so as not to cause errors in the test results. When checking for infectious diseases, such as influenza nucleic acid test and new coronavirus nucleic acid test, you should wear a mask as required to avoid cross infection. You can consult the relevant doctor before doing nucleic acid test and follow the doctor’s requirements.