The Carbon 13 Urea Breath Test is a non-invasive test that allows you to eat after it is done with no special dietary contraindications. Carbon 13 urea breath test is used to check the Helicobacter pylori bacteria a test method, usually let the patient swallow a capsule containing carbon 13 labeling, sit still for 30 minutes, start blowing, by checking whether the gas blown out by the patient contains carbon 13 to clarify whether the patient is infected with Helicobacter pylori bacteria. Carbon 13 urea breath test is a non-invasive test, will not cause significant stimulation of the gastric mucosa, so you can eat after the test, there is no special dietary contraindications, mainly pay attention to a light diet, avoid eating cold spicy and other stimulating foods. Carbon 13 urea breath test needs to fast for 6 hours before the test, avoid taking proton pump inhibitors 2 weeks before the test, and avoid taking antibiotic drugs 4 weeks before the test, such as omeprazole, cephalosporin, etc., to avoid the impact on the results. The normal value of carbon 13 urea breath test is 0~4dpm, the test result is greater than 4dpm indicating the existence of Helicobacter pylori infection, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to carry out eradication treatment, so as not to delay the condition.