Doctor insights on:
What Can You Have 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
NO: It will change the results. Fasting means fasting. Rinse your mouth out if you're dry. ...Read more
Yes: You can, as long as it has no calories in it. ...Read more
Decaf tea before a fasting blood test? Its sweetened with splenda. I assume its a no but wondering if you can?
Yes: You can have decaf tea or coffee before fasting blood test. Hold the milk and sweetener though. ...Read more
Can I brush my teeth before a fasting blood test (glucose, lipids, etc.)? Does the toothpaste affect the results?
No: You can safely brush your teeth , don't swallow the half of the toothpaste tube ! ...Read more
I took Gabapentin and Adderall XR before a fasting blood test for my liver. Will that alter the results and make it look as if everything is ok when i?
Liver tests: the medications should skew your liver tests either way ...Read more
Need Eight hours: The minimum fasting period is eight hours. If you get your blood drawn after 9:00 am, you should be okay. It is preferable to have a 12 hour fast. ...Read more
Direct measurement of LDL is accurate in non-fasting condition. Triglyceride levels are not reliable in non-fasting state.
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex. ...Read more
Blood Testing: Nope. Not at all.Get a more detailed answer ›
I had a MMA B-12 blood test done that was normal and wasn't fasting, is test most accurate when have been fasting?
Unclear info: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, it would have been useful to have the results. MMA is a urine test and B 12 a blood test and neither is affect by fasting. ...Read more
If a person took a bilirubin blood test while fasting for 12 hours,and took the same test while not fasting, would the results be the same?
Shuld be..: Fasting does not usually affect the bilirubin levels. Did the test differentiate between direct and indirect bilirubin levels? That can tell us sometimes where the elevation is coming from. You should follow up with the doctor who ordered your tests for further discussion about the results and where to go from here. ...Read more
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