Do women need to fast for blood test?

Whenever we have a blood test, the doctor will ask us to fast. This is mainly because after we eat, the substances in the food will change the characteristics of the blood, making the blood test ineffective. So from this we can see that the question of whether we need to fast for a blood test is not difficult to answer. Next, let us understand together whether we need to fast for a blood test? People who don’t know much about it can take a look.

Medical examinations generally require fasting blood samples unless there are special requirements for the specimen. Early pregnancy test uses immunological method to detect HCG concentration level in the blood. The reaction is highly specific and a light diet has little effect on the test results. Don't worry if you don't have an empty stomach in the morning.

A routine blood test is a common test during a physical examination. Through a routine blood test, you can obtain information about many organs in the body, including the liver, kidneys, blood sugar, blood lipids, etc. You can understand your risk of developing liver disease or fatty liver disease, and you can also know information such as your body's immunity. Generally speaking, a routine blood test requires fasting. You should be on an empty stomach before the test, but fasting is not as simple as skipping breakfast. You should avoid eating greasy food the night before the examination, and you should fast after 8 o'clock. If you still have a midnight snack at 12 o'clock, you will not be able to ensure that you are on an empty stomach when your blood is drawn. On the morning of the physical examination, no beverages, including juice and milk, are allowed except boiled water. If you want to get better test results, it is best to eat a basically vegetarian diet starting three days before the test.

Why do we need to fast for routine blood tests? What are the benefits of fasting before a blood test? An expert from the hospital's liver disease department said that fasting before a routine blood test has the following three benefits: Each test uses a different testing method and the normal values ​​are also different. Normal data is obtained by measuring the fasting blood of a large number of normal people. Because the body is relatively in a basal metabolic state when fasting, the influence of factors such as food is eliminated, and the properties are relatively stable, it can reflect the true situation of human blood. After statistical processing of many test results, the normal value detected by this method was obtained. Therefore, when we conduct blood tests on patients, we should also draw fasting blood for tests. Only such test results are reliable, can truly reflect the patient's actual condition, and can provide valuable evidence for diagnosing the disease. After eating, food is chewed in the mouth, digested and absorbed by the gastrointestinal tract, enters the blood, and is then transported to various tissues and organs throughout the body by the blood.

Therefore, certain components in food enter the blood and increase the concentration of certain components in the blood. Thus, the test results may be incorrect. What kind of people are easily infected with hepatitis C? If the person who has his blood tested in the morning has eaten, then a large amount of chylomicrons produced after digestion of the food will be quickly absorbed into the blood, and the blood will become turbid, which is medically called fatty blood. Since many blood biochemical tests are judged by changes in the color of the specimen, if the blood appears turbid due to chylomicrons, it will be difficult for the testers to observe clearly, which will ultimately affect the accuracy and reliability of the results. From this we can see that fasting blood drawing will not be affected by factors such as foreign food, and can reflect the true physiological condition of the human body.

By answering the question of whether it is necessary to fast for blood tests, we can see that it is not only blood tests that require fasting. In our daily lives, we also need blood tests when we check other physical problems. Therefore, before we have a physical examination, it is necessary to have an in-depth understanding of this knowledge so that we can better conduct physical examinations.