do you have to fast for a blood test for cholesterol?
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Generally you're required to fast, consuming no food or liquids other than water, for nine to 12 hours before the test. Some cholesterol tests don't require fasting, so follow your doctor's instructions.
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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.
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How long should you fast before a blood test? The amount of time you need to fast for will vary depending on the test. For most tests, you will be told not to consume anything but water for eight hours leading up to the test. For a few tests, a 12-hour fast may be needed.
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A cholesterol test, or screening, tells your health care provider the levels of LDL and HDL cholesterol in your blood. This information helps your health care team determine your risk for heart disease or stroke. Plaque is made up of cholesterol deposits.
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Not all blood tests will require you to fast beforehand. Blood tests that you will likely need to fast for include: blood glucose test. liver function test.
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After starting a statin, it takes about six weeks for cholesterol levels to stabilise, so most doctors would re-check your cholesterol after about eight weeks. You should have a check-up at least once a year or more often if your doctor thinks it is necessary.
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a fasting blood glucose test (used to test for diabetes) – you fast for 8 to 10 hours before the test. an iron blood test (used to diagnose conditions such as iron deficiency anaemia) – you fast for 12 hours before the test.
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For this test you will need to fast for 8 hours before test. When you arrive at the lab or health care facility, you will: Have your blood tested. Drink a special liquid containing glucose.
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Preparing for an FBC There is no preparation necessary for a full blood count. It can be done at any time of the day. However, if the blood test will be used not only for a blood count but for other reasons (e.g. glucose or cholesterol monitoring), you will be required to fast beforehand.
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For a fasting blood glucose test, you can't eat or drink anything but water for eight hours before your test. You may want to schedule a fasting glucose test first thing in the morning so you don't have to fast during the day.
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You can eat and drink as normal before some blood tests. But if you're having a "fasting blood test", you will be told not to eat or drink anything (other than water) beforehand.
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There is a range of things that people can do when fasting for a blood test. These include: Water: It is important to keep drinking plenty of water when fasting to stay hydrated. Water does not affect the results of a blood test and is acceptable to drink when asked to fast.
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You don't need any special preparations for a calcium blood test or a basic metabolic panel. If your health care provider has ordered more tests on your blood sample, you may need to fast (not eat or drink) for several hours before the test.
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Do I need to fast before I have my blood test? Food does not usually affect your blood tests for hormonal studies, so it's okay to eat.
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Fasting is required for a period of 8-10 hours prior to the test. (No food or fluids such as tea, coffee or fruit juice.) You may have sips of water if you are thirsty. Due to the nature of the test, testing is generally done in the morning.
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This means that you should consume no food or drink (except plain water) for at least 12 hours before the blood test. Please DO continue to take any prescribed medication with water only. It is possible to perform the blood test if you have not fasted.
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This test may be measured any time of the day without fasting. However, if the test is drawn as part of a total lipid profile, it requires a 12-hour fast (no food or drink, except water).