Have you ever wondered why you must abstain from food and water before a blood test? How many hours do you have to abstain from food and water for this test? What happens if you don’t abstain?
Blood tests are an effective and accurate way to diagnose certain diseases, especially diseases that cannot be analyzed from history or symptoms. As the nutrients we eat enter the bloodstream. This means that the blood results may vary from reality. ทางเข้า UFABET สำหรับสมาชิกใหม่ สมัครวันนี้ รับโบนัสฟรี Therefore, it is very important that we do not eat or drink. Before a blood test to check certain values in order for the blood results to be as accurate as possible.
How should I prepare before taking blood?
The time period for fasting varies depending on the purpose of the blood test. People who undergo a blood test should prepare themselves and follow the following guidelines:
- To test blood sugar levels, you must abstain from food, drinks, snacks, candy, and chewing gum of any kind for at least 8 hours before the blood test. However, you can drink water because what we eat, apart from water, will affect the blood glucose level.
- For blood lipid testing, you must abstain from food, drinks, snacks, candy, and chewing gum for at least 10-12 hours, but you can drink water. For triglycerides and bad cholesterol (LDL), you should abstain from alcoholic beverages for 3 days before the blood test.
- Blood iron level test generally does not require fasting or refraining from eating before the test. However, the doctor may consider each individual’s preparation method, as those who are taking certain medications may have their Serum Iron levels higher or lower than the actual value.
- To measure vitamin B12 levels , you should fast for 12 hours before taking blood.
- Kidney function tests ( BUN, Creatinine) do not require fasting or refraining from eating before the test, but you should reduce your intake of red meat for 2-3 days before the test.
Whether or not a blood test will have accurate results depends on the test procedure and the behavior of the person being tested. Therefore, before receiving a blood test, you should clearly understand the preparation before the test and strictly follow the doctor’s advice.
Avoid before getting a blood test
In addition to fasting and refraining from eating, there are also some behaviors that should be avoided before having a blood test, such as:
- Drinking alcoholic beverages
- Smoking
- Chewing gum
- exercise
If the person undergoing a blood test does one or more of the above, they must inform the doctor of the truth. The doctor may schedule another blood test later if they have acted correctly before undergoing the blood test. This is for their own benefit so that they do not have to do it repeatedly.