The normal value of the C14 breath test is not 0 to 50; the normal value is usually less than 100 (dpm/mmol CO2), which is negative. The C14 breath test is a test to check for H. pylori infection. If the test value is less than 100 (dpm/mmol CO2), it is negative, indicating no H. pylori infection. Whereas, if the test value is greater than 100 (dpm/mmol CO2), it is positive, indicating the presence of H. pylori infection. H. pylori is a disease-causing bacterium, and when there is H. pylori infection, it often causes chronic gastritis, peptic ulcer, stomach cancer, lymphoproliferative gastric lymphoma, and so on. The common treatment for removing H. pylori is quadruple anti-H. pylori therapy, which involves the use of drugs such as omeprazole, amoxicillin, clarithromycin, and bismuth potassium citrate. If the examination reveals a positive C14 breath test, one should go to the hospital in time and have the doctor arrange a scientific treatment plan, and should not take it lightly or deal with it on one’s own, so as not to delay the condition.