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Fasting blood glucose measures the amount of glucose (sugar) in your blood to test for diabetes or prediabetes. Typical fasting time: At least 8 hours. Lipid profile is used to check the level of cholesterol and other blood fats. High levels put you at risk for developing heart disease or having a stroke.
With certain blood tests, you may be instructed to fast for up to eight hours before your appointment. Fasting before a blood draw means you don’t eat or drink anything except water. Don’t wait until the day of your blood draw to ask if you should fast. That could cause your appointment to be rescheduled.
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.
Fasting Instructions for Blood Test While fasting, specifically when it's for cholesterol and triglyceride screening,... You can drink small amounts of water, but avoid fruit juices, tea,... If you have any regular medication that has to be taken, you can ask your doctor if it is allowed. Chewing ...
Fasting Blood Work 1. Do not eat or drink anything except plain water for 12 hours before having your blood drawn. 2. Avoid smoking, breath mints and gum chewing prior to having your blood drawn. 3. Take any medications ordered by your provider but do not follow any food-related instructions... ...
Not all tests require it, so it is a good idea to ask your doctor to confirm if you should fast before the test. Fasting is important because what you eat may change test results. There will be a change in your blood cholesterol and levels of triglycerides if you have the lab work done after eating something.