C14 breath test, also known as carbon 14 breath test, the test result is 0, indicating that it is normal meaning negative, on behalf of the body is not infected with Helicobacter pylori. Carbon 14 breath test normal value of 0 ~ 100, the test result is zero that is within the normal reference range, that is, on behalf of the body is not infected with Helicobacter pylori, this pathogenic bacteria is a normal test results, if the body does not have other uncomfortable symptoms, do not need to worry and take treatment measures. If there are still symptoms of gastrointestinal discomfort, gastroscopy and other ancillary tests should be done to see if there are other causes of gastrointestinal diseases, and the appropriate examination and treatment should be carried out according to the doctor’s instructions.