Is it OK to have breakfast e.g. porridge before a blood draw?

Do not eat breakfast before the blood draw.

In order to check your health, it is okay to skip meals once in a while.

Specific reasons: 1. It is generally required to draw blood in the morning, try to minimize the amount of exercise before blood drawing, do not eat food, and keep an empty stomach.

2. You can drink a small amount of water, except for some experimental results that must be taken on time.

3. Venous blood is generally collected for blood examination, and venous blood test is carried out except for special requirements.

No; Since the health examination requires the examination of liver function and kidney function, if you eat will affect the results of the examination, it is required that you do not eat within 8 hours before the blood draw of the physical examination!

Because after eating and drinking, blood pressure will rise, and the consistency will increase, and the value of normal blood cannot be tested.

It depends on the inspection items: some can't be eaten! If it's not clear, it's better not to eat!

If it's blood donation, you can eat it!

First of all, see what tests you do, don't drink too much water to donate blood.

The blood test generally requires starvation of blood, and it is necessary to take a blood in the morning without eating or drinking.

In addition, sometimes you can't eat the night before the blood draw and the next morning, you can't eat breakfast, you can't drink water, and the blood draw is generally carried out in the morning, so you must pay attention to sleep well before the blood draw, abide by the precautions before the blood draw, and the results can be obtained in the morning and afternoon.

In addition, if you drink alcohol the day before the check-up, you need to postpone the check-up.

You should not eat breakfast before the blood is drawn, you should try to minimize the amount of exercise, keep the lead answer on an empty stomach, and you can drink a small amount of water.

It is best to have a blood test on an empty stomach.

The fasting criteria are: the night before the blood draw, try to maintain the usual lifestyle habits and eat normally; Meals should be light and do not drink alcohol; Do not drink coffee or strong tea after meals. When I woke up the next morning, I didn't eat breakfast, drank little or no water, didn't do morning exercise, and calmly went to the hospital to wait for blood collection.

Do not over-fasting, excessive fasting will also affect the test results. If the fasting time is more than 18 hours, some tests may have abnormal results, such as serum bilirubin may increase due to fasting time, and blood sugar may decrease to hypoglycemia due to prolonged fasting.

Generally, after 8 p.m. the night before the blood draw, you should fast: avoid heavy alcohol consumption, the alcohol content in the blood will directly lead to an increase or decrease in the results; Before blood is drawn to check blood lipids, it is best not to eat foods that are too high in fat, such as shabu-shabu, button meat, etc.; Before checking cholesterol, you should eat less eggs, which will affect the composition of the blood and cause "misjudgment". However, if it is just a simple test for hepatitis B, it does not matter if you eat something, and it will not affect the results much.

Guidance: It is recommended that you should get enough sleep at night before blood drawing, and should not do strenuous exercise in the morning. Because strenuous exercise can temporarily increase alanine aminotransferase (ALT) and aspartate aminotransferase (AST), it can also cause changes in blood potassium, sodium, blood sugar and other components, affecting the measurement results.

In addition, it is also necessary to relax when blood is drawn, because fear will cause blood vessels to constrict, making it more difficult to collect blood.

1. The blood test results are most accurate when you are fasting in the morning.

The amount of exercise, eating, work, physical fatigue, etc., will have a certain impact on the blood draw results, just get up in the morning, the physical state is relatively stable, and the test results are relatively more accurate.

2. Examination items that require fasting blood drawing.

1. Various blood chemical examinations. Blood glucose, total blood lipids, cholesterol, triglycerides, lipoproteins, serum protein electrophoresis, carbon dioxide binding capacity, various serum enzymes, A fetal globulin, serum immunoglobulin, mucin, etc.

2. Blood and liver function tests.

3. Blood and kidney function measurement.

4. Glucose tolerance test.

5. Serological and immunological examinations. Such as total complement, C3, rose petal test, antinuclear antibody, hepatitis B surface antigen, Phytococcus reaction, anti-streptococcal hemolysin "O" determination, rheumatoid factor test, etc.

6. Various blood rheological measurements. Such as whole blood viscosity, plasma viscosity, serum viscosity, platelet viscosity, etc.

Before the blood draw, you can't eat breakfast, try to reduce the amount of exercise, keep an empty stomach, and drink a small amount of water.

In general, the items that require zhi to go to the blood draw on an empty stomach are:

The first is about blood and liver function tests.

The second is the examination of blood and kidney function.

The third is about various blood tests, such as blood sugar, total blood lipids, cholesterol, etc.

The fourth is the experiment of glucose tolerance, and the fifth is the measurement of various blood, such as serum viscosity, platelet viscosity and so on.

Sixth, serological and immunological examinations, such as antibodies.

There are several reasons why fasting blood is needed, which are:

One is that after eating, various digested food chylomicrons will be quickly absorbed into the bloodstream, making the blood appear cloudy, commonly known as fat blood, so that the examiner can not clearly observe the situation.

Second, the mood is relatively stable in the morning, which belongs to the basal metabolic state, and the results obtained can reflect the actual situation more realistically.

The third reason is that eating can affect some components in the blood. Therefore, it is recommended that you must have an empty stomach and not eat when taking blood, so as not to affect the accuracy of the test results.

Before blood drawing, you should not eat breakfast, try to reduce the amount of exercise, keep an empty stomach, and drink a small amount of water.

In general, the following items require blood drawing on an empty stomach:

1. Examination of blood and liver function.

2. Examination of blood and kidney function.

3. Examination of various types of blood. For example: blood sugar, total blood lipids, cholesterol, etc.

4. Test on glucose tolerance.

5. About the determination of various bloods. For example, serum viscosity, platelet viscosity, etc.

6. Serological and immunological examinations. For example, antinuclear antibodies, etc.

There are several reasons why fasting blood is needed, which are:

1. Because after eating, all kinds of digested food chylomicrons will be quickly absorbed into the blood, making the blood appear turbid, usually called "fat blood", so that the examiner can not clearly observe the situation.

2. In the morning, the mood is relatively stable, in the basal metabolic state, and the results obtained can reflect the actual situation more realistically.

3. Because eating will affect some components in the blood.

Venous blood is generally collected for blood testing, and venous blood tests are generally required to draw blood in the morning except for special requirements, and try to minimize the amount of exercise before blood drawing, do not eat food, keep an empty stomach, and drink a small amount of water.

It is correct to say that you can not eat breakfast when taking blood tests about blood sugar and blood lipid levels, and eating will affect the blood concentration of these components, and the normal value range is generally determined based on the results of the test after fasting, and the changes of each person are often inconsistent due to individual differences after eating.

Don't eat It is recommended that you go with breakfast and eat it after the blood is drawn, because I am like this.

Some blood tests can be checked at any time, such as red blood cells, white blood cells, platelets, etc. Some blood tests require blood tests to be taken on an empty stomach (skipping breakfast) in the early morning, such as kidney function, liver function, erythrocyte sedimentation rate, blood glucose, etc. This is because:

1. Avoid the influence of factors such as diet on some components in the blood. Because food is absorbed by the gastrointestinal tract into the bloodstream and then transported from the bloodstream to the whole body, the concentration of certain components in the blood will increase, affecting the accuracy of the test results.

2. After eating, all kinds of digested food chylomicrons are quickly absorbed into the blood, making the blood appear turbid, commonly known as "fat blood", so that the examiner can not observe clearly.

3. The mood is relatively stable in the early morning, the body is in a basal metabolic state, and the results obtained can reflect the actual situation more realistically.

The so-called fasting refers to not eating after dinner and not eating early the next morning, in which case the blood test is the best.

It depends on what you want to test, but it's generally best to have an empty stomach.

Strict fasting" items: fasting blood glucose, blood lipids, renal function (mainly blood urea and blood uric acid), liver function (mainly bilirubin, aminotransferases), blood viscosity, fasting examination is required.

"Small fasting" items: coagulation function, glycosylated hemoglobin, blood routine, blood sedimentation rate, immunology all laboratory items such as hepatitis B trilineage, hepatitis full set, various hormones, myocardial markers, thyroid function, tumor markers, autoantibodies, RA and so on do not need to be "strictly fasting", as long as you do not eat a high-fat and high-protein diet.

Postprandial items": Half an hour after a meal blood glucose, C-peptide, insulin, please strictly follow the doctor's instructions to take the sugar and pinch the accurate time to draw blood.

Of course, for general biochemical test blood drawing, the doctor recommends that blood is drawn on an empty stomach as much as possible to collect all the test items at one time.

Note: What is a "small fasting"? It refers to people who do not eat high-protein, high-fat foods in the morning and only drink low-fat foods such as porridge, and such people can postpone blood tests at noon or in the afternoon (more than 4 hours after breakfast).

Is there also the best time to draw blood on an empty stomach? Don't ignore the two precautions before the physical examination, so as not to affect the test!