The normal value of Carbon 14 test is 0~100dpm. Carbon 14 breath test is a kind of test to detect the presence of Helicobacter pylori infection in the organism by breathing and blowing, which is extremely accurate for Helicobacter pylori infection, and it has also become a preferred method for diagnosing Helicobacter pylori infection and reviewing after treating Helicobacter pylori in clinic at present. Moreover, this test has more important significance for the treatment of peptic ulcer, chronic gastritis and other diseases, and its normal range is 0~100dpm, and if it exceeds this value, it suggests the existence of H. pylori infection. If an abnormal value occurs after the carbon 14 breath test, it is recommended to go to the hospital and need to be treated under the guidance of a doctor.