Do you need to be fasting to check for stomach problems?

The most common examination method of stomach disease is gastroscopy and X-ray barium meal radiography, which requires fasting. Generally, patients are required to fast for at least eight hours before examination. After 12 o 'clock the night before, they cannot eat water again. If they do carbon 13 and carbon 14 breath test, they should not be fasting. Eating does not affect the test results.