The carbon 14 breath test can be a false positive. Carbon 14 Breath Test is an H. pylori breath test, which is a method of determining whether a patient is infected with H. pylori by measuring the amount of carbon 14 in the exhaled breath through a highly sensitive mass spectrometer after taking a certain amount of carbon 14-labeled urea orally, and has the advantages of being highly accurate, highly specific, non-invasive, convenient, and quick. Carbon 14 breath test can provide a basis for the treatment of chronic gastritis, peptic ulcer, etc., and also has certain clinical significance for the prevention of gastric cancer. The H. pylori breath test is not recommended for infants, small children and other people who are unable to cooperate with blowing. It should be noted that the results of this test are easily affected by diet and medication, so you should fast for at least 2 hours before the test, stop taking acid-suppressing medication for 2 weeks and stop taking antibiotics for 4 weeks. If you take medication or food before the test, it may cause false-positive or false-negative Carbon 14 Breath Test results, which may affect the judgment and treatment of the disease. Before starting the Carbon 14 Breath Test, you should follow the doctor’s instructions to stop the medication that affects you, etc., and perform the test and review under the doctor’s supervision.