do you have 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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If your blood sample is being tested only for ferritin, you can eat and drink normally before the test. If your blood sample will be used for other tests, you might need to fast for a time before the test. Your doctor will instruct you.
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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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How do you prepare for a blood test? Some blood tests will require you to fast beforehand. In these cases, your doctor will instruct you not to eat or drink anything, except water, in the hours leading up to the test.
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Some of these tests will require you to fast beforehand. Your doctor will advise you how to prepare for each test. Fasting is usually safe if you're pregnant, provided you're in good health and aren't having a high-risk pregnancy.
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Your doctor will recommend which blood tests you should have and how often. Generally, if your cholesterol is normal, you can repeat this test every five years. However, you should be tested annually if you have unhealthy levels or if you have a family history of heart disease or high cholesterol.
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A. No. You do not need to fast and you can test your blood any time of the day. It is best to collect the blood sample before eating or several hours after a meal.
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Takeaway. Getting your cholesterol levels tested is an important part of keeping your heart and blood vessels healthy. In general, fasting before your test isn't required. But your doctor may recommend fasting if you're already taking a cholesterol medication.
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That's why a fasting blood test usually requires fasting for 8-12 hours before your blood is taken. It's also recommended that you avoid alcohol for 24 hours before your fasting blood test, as well as any strenuous exercise.
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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.
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Fasting means that you abstain from all food and fluids other than water for a period of 8-14 hours prior to your test. Alcohol should not be consumed for 72 hours (3 days) prior to the test. You should avoid smoking during the fasting period. Do not fast for more than 14 hours prior to your testing.
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You don't need any special preparations for a potassium blood test or an electrolyte 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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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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The test includes four basic parameters: total cholesterol, HDL cholesterol, LDL cholesterol and triglycerides. It is usually done in fasting blood specimen. Fasting refers to 12–14 h overnight complete dietary restriction with the exception of water and medication.
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You usually need to fast for 8–12 hours before a test. Most tests that require fasting are scheduled for early in the morning.
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You do not need to fast before the test. Normal test results mean that there is no evidence of any of the infections tested for, at the time the samples were taken.
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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.