Why do I need to fast before my blood test?

Why do I need to fast before my blood test?

Why do I need to fast before my blood test? If your health care provider has told you to fast before a blood test, it means you should not eat or drink anything, except water, for several hours before your test. When you eat and drink normally, those foods and beverages are absorbed into your bloodstream.

What happens to your blood sugar when you fast?

For instance, if you eat or drink before a fasting blood glucose test, your blood sugar probably will be higher than if you hadn’t had anything. When you’re fasting, doctors get a baseline result so tests can be compared to give a true picture of your sugar levels over time.

Why do you have to fast for lipid profile test?

These tests typically require fasting: Fasting blood glucose measures the amount of glucose (sugar) in your blood to test for diabetes or prediabetes. Lipid profile is used to check the level of cholesterol and other blood fats. Basic or comprehensive metabolic panel is often part of a routine physical.

Why is it important to prepare for blood work?

If you have an upcoming fasting blood test, it’s vital to prepare accordingly. Preparation for fasting blood work will not only help ensure the accuracy of your testing, but it can also help make the process a little easier to handle. Here are some tips to help with blood work preparation:

How many hours should you fast before blood work?

There are three main tests that require fasting — glucose, cholesterol and iron. Cholesterol screenings require you to fast for at least 9 to 12 hours prior to blood work, with a 24-hour break from alcohol prior to testing.

Why do some people need to fast before a blood test?

Fasting before certain blood tests is important to help make sure that your test results are accurate . The vitamins, minerals, fats, carbohydrates, and proteins that make up all food and beverages can impact blood-level readings, clouding the results of your test. Not all blood tests will require you to fast beforehand.

What does fasting before blood work mean?

Fasting simply means not eating anything for certain hour before going for blood tests. This helps to ensure that the test results are accurate and are not influenced by the food or the drinks taken.

Why should I fast before taking blood tests?

Certain blood tests require you to fast for 8-12 hours. The reason for asking you to fast is because when eat or drink beverages, certain nutrients, substances or vitamins enter into the bloodstream and can be responsible for giving a wrong result . Fasting before these advised blood tests ensures more accurate results.