It is recommended not to eat breakfast during the Hepatitis B test, as eating breakfast may affect the results. Hepatitis B test usually includes Hepatitis B 5, liver function and abdominal ultrasound. Hepatitis B 5 is a blood test to check for antibodies and antigens related to the Hepatitis B virus, which is usually independent of whether or not you have eaten, as the antigens and antibodies to the Hepatitis B virus in the body are not usually affected by diet. Liver function tests usually measure the activity of related enzymes such as alanine aminotransferase and alanine aminotransferase, which are more obviously affected by food intake, and serum bilirubin and albumin, which may also be affected by food intake. Abdominal ultrasound examination, eating may also affect the accuracy of imaging, need to get up in the morning fasting examination, therefore, in the hepatitis B examination before the best not to eat breakfast.