how long do i need to fast for a cholesterol test?
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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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A high reading may indicate liver disease, bile duct problems, or alcohol abuse. Your doctor may ask you to fast for at least 8 hours beforehand. You also may need to avoid alcohol and some prescription drugs the day before the test because they can affect GGT levels.
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Common fasting blood tests Examples of blood tests that require you to fast include: 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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You will be asked to come to the test fasting — not having had anything to eat or drink for the previous eight hours. A fasting blood sugar will be obtained.
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Typically, fasting for 9-12 hours (drinking water only) before having your blood drawn is required, but some healthcare practitioners allow non-fasting lipid testing. In particular, children, teens and young adults (ages 2 to 24) may have testing done without fasting.
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You may be instructed not to eat or drink anything except water for 9 to 12 hours before having your blood drawn. This is called a "fasting blood test." Fasting is not always necessary, but it may be recommended. Usually, you are allowed to take your medicines with water the morning of 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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a fasting blood glucose test (used to test for diabetes) – you fast for 8 to 10 hours before the test.
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Requirements Prior to the Test 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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Common fasting blood tests Examples of blood tests that require you to fast include: a fasting blood glucose test (used to test for diabetes) – you fast for 8 to 10 hours before the test.
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General guidelines: During your fast, you may drink water, but it must contain no additives (e.g. tea, coffee, or cordials). You should avoid alcohol for 24 hours (1 day) prior to the test, if possible.
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Do not break an atorvastatin tablet before taking it. It may take up to 2 weeks before your cholesterol levels improve, and you may need frequent blood tests. Even if you have no symptoms, tests can help your doctor determine if this medicine is effective.
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Taking blood from your arm Some blood will usually be taken from your arm with a needle. This is sent to a lab to check your cholesterol level. You should get the result in a few days. You might be asked not to eat anything for up to 12 hours before the test.
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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).
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Fasting for a lab test typically lasts eight hours. Your doctor should give you any special instructions related to your tests, including fasting requirements.
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What was the point of fasting before having a cholesterol test? Not eating for eight to 12 hours before having blood drawn for a cholesterol test was thought to give a more accurate assessment of total cholesterol, harmful LDL cholesterol, protective HDL cholesterol, and triglycerides, a type of fat-carrying particle.
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fasting – you need to fast four to six hours prior to your test. other tests – you may undergo various tests before the angiogram, including blood tests, an electrocardiogram and chest x-ray and cardiac CT (computed tomography).