The best hepatitis B examination blood draw is fasting, the details are as follows: 1, do not need to fasting: if simply to check whether there is no infection to hepatitis B, you can do hepatitis B two to half, hepatitis B virus DNA and other tests, this situation does not require fasting, because this test is more specific, usually will not be affected by food; 2, need to fasting: if you want to check the liver function and abdominal hepatobiliary pancreatic spleen ultrasound, are required to carry out Fasting, because this situation food may easily affect the test results, otherwise it is easy to affect the test results, so that patients spend money, so it is recommended that the test is best fasting. In addition, before the hepatitis B examination diet should pay attention to a light diet, eat more fresh fruits and vegetables, avoid spicy and stimulating food. Pay attention to regular work and rest, avoid staying up late, and don’t get too excited emotionally.