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Doctor insights on: What Is A Fasting Blood Test For

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What do the results of a fasting blood test indicate?

What do the results of a fasting blood test indicate?

Depends on test: Ask you doctor what they are specifically testing because there are different tests that are done fasting. Most common are fasting blood sugar and cholesterol. ...Read more

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What can they test for during fasting blood test?

Standardize results: Many test are done fasting because food or drink can affect the results. Therefore, the standard measurements are done fasting to make them reproducible. Glucose and lipids are 2 tests that usually need to be performed in a fasting state. ...Read more

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Can what you eat the day before affect a fasting blood test?

To a modest degree: The most important thing to to make sure you fast, not change your normal diet because of the testing. ...Read more

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Do i need to have a fasting blood test while taking metherexate?

No: The test done to look for Methotrexate toxicity do not have to be done in a fasting state. ...Read more

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Can you fast too long before a fasting blood test?

In a way, yes: If you fast for longer than a day or so, it will alter some blood chemistries. Fasting tests are usually set for an overnight fast, or a 12 hour fast. Prolonged fasting is starvation and it affects the body metabolism. ...Read more

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Can you have a cup of tea before a fasting blood test?

You shouldn't: While the tea by itself is considered a "liquid" only, you may mix it with sweetner or cream. Further, there can be stimulating effects, which may have a change in your glucose or Insulin release. Just better to have water only. ...Read more

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Could a fasting blood test tell if I have hypothryoidism?

Could a fasting blood test tell if I have hypothryoidism?

Possible: If the lab order included the thyroid function test. Usually the routine blood work does not include thyroid function test, unless the ordering doctor is suspecting that you have signs or symptoms of hypothyroidism. Hope this helps. ...Read more

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Can you drink diet pop before a fasting blood test?

Can you drink diet pop before a fasting blood test?

NO: It will change the results. Fasting means fasting. Rinse your mouth out if you're dry. ...Read more