do you have to fast for a bmp blood test?
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Basic or comprehensive metabolic tests: Tests for blood sugar, electrolyte balance, and kidney function. Typically, people will be asked to fast for 10 to 12 hours before having one of these tests.
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You should not eat for eight hours before having your blood glucose measured to check for diabetes or to see how well treatments are working. An alternative test for glucose level that does not require fasting measures a substance called hemoglobin A1c, which reflects average blood sugar over the previous three months.
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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. If at any point you're unsure if fasting is required, contact your doctor.
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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 don't need to fast before all blood tests. Your doctor will tell you if you need to. These tests typically require fasting: Fasting blood glucose measures the amount of glucose (sugar) in your blood to test for diabetes or prediabetes.
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Testing for gestational diabetes You are required to fast for 8 to 12 hours (you may drink water during this period) and then you have a blood test. After the blood test you have a drink that contains glucose.
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For example, measurements of kidney, liver, and thyroid function, as well as blood counts, are not influenced by fasting. However, fasting is required before commonly ordered tests for glucose (blood sugar) and triglycerides (part of the cholesterol, or lipid, panel) for accurate results.
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Common fasting blood tests a fasting blood glucose test (used to test for diabetes) – you fast for 8 to 10 hours before the test.
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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.
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A CBC and CMP-14 provide information about your health. Preparation: Fasting 10-12 hours required. Water is ok. Test Results: 1-2 days.
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If you are having a vitamin B blood test, you may need to fast (not eat or drink) for several hours before the test. You don't need any special preparations for a urine test.
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When your doctor orders a CBC, there are no special preparations you'll need to take before the test. You are not required to fast (not eat solid foods for 12 hours or so), unless you are having other tests done at the same time that require it.
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Fasting before blood tests Fasting means that you eat and drink nothing except water for 8 –16 hours before your blood test (12 hours optimal).
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How to prepare for this test. If you're asked to fast, you can't eat anything for 8-10 hours before the test. You should drink only water. If you are having an OGTT, you will need to drink a glucose drink provided after your fasting test, then stay for an additional few hours for further testing.
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If your blood sample is being tested only for a complete blood count, you can eat and drink normally before the test. If your blood sample will be used for additional tests, you may need to fast for a certain amount of time before the test. Your doctor will give you specific instructions.
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Typically, you will be asked to fast for 8 hours before the blood sample is collected. Occasionally, a healthcare practitioner may do testing when fasting is not possible, such as when a glucose tolerance test is done.
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Fasting before a blood test is when people are asked not to eat or drink anything other than water before some blood tests. But which blood tests require fasting and how can people fast safely? Fasting is not always necessary before a blood test, but when it is, it is only for a short time.