How long should I fast before a breath test

Before a breath test, it is usually necessary to fast for 8-12 hours.

Breath test is a common medical examination method mainly used to detect helicobacter pylori infection or evaluate gastrointestinal function. Before the examination, it is necessary to maintain an empty stomach to ensure the accuracy of the test results. A short fasting time may lead to food residue in the stomach, affecting the test results. Long fasting time may cause discomfort symptoms such as hypoglycemia. Fasting for 8-12 hours can effectively empty the stomach of food while avoiding physical discomfort caused by prolonged fasting. Before the examination, it is advisable to drink moderate amounts of water, but one should avoid consuming sugary drinks or liquids such as milk that may affect the test results. Smoking should be avoided on the morning of the examination, as smoking may affect the test results. Antibiotics, bismuth agents, or proton pump inhibitors should be avoided one week before the examination, as these drugs may interfere with the test results. During the examination process, it is necessary to follow the doctor's guidance for exhalation operations, which usually require exhaling in batches into a dedicated collection bag. After the breath test, you can eat immediately. It is recommended to choose light and easily digestible foods and avoid spicy and irritating foods. If the test result is positive, it suggests the possibility of Helicobacter pylori infection and requires standardized treatment under the guidance of a doctor. Breath test is a non-invasive examination method with high safety and generally does not cause significant discomfort. Before the examination, it is necessary to provide a detailed explanation of recent medication use and medical history to the doctor, so that they can assess whether the examination is suitable. If there is obvious hunger or discomfort before the examination, you can consult a doctor to see if the examination time needs to be adjusted.