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do you need to fast for a bun test

A member asked:
Dr. Gurmukh Singh
48 years experience Pathology
No.: No.
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A 56-year-old male asked:
Dr. Robert Kwok
32 years experience Pediatrics
Ask ordering Dr.: One's ordering doctor can help, as numbers are just numbers. Without details and the whole picture, such as why was labwork done, numbers cannot say m ... Read More
A 35-year-old male asked:
Dr. Michael Brodowski
44 years experience Internal Medicine
They are valid: diet does need to be taken into account, also degree of hydration
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1 thank
A 54-year-old male asked:
Dr. Dwain Rickertsen
35 years experience Family Medicine
Family practice : It stands for blood urea nitrogen. It is usually run with a creatine test to determine how your kidneys are functioning.
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1 thank
A 34-year-old member asked:
Dr. Peter Kurzweil
49 years experience Internal Medicine
No: Microalbuminuria is the presence of small amounts of protein in the urine, usually too small to note on a dipstick test. A trace amount of protein can ... Read More
A 48-year-old member asked:
Dr. Gurmukh Singh
48 years experience Pathology
No: Blood test for thyroid functions does not require fasting.
A 46-year-old member asked:
Dr. S. Smiley Thakur
30 years experience Nephrology and Dialysis
No: Fasting is to check glucose and triglyceride levels.
A 56-year-old member asked:
Dr. Austina Cho
25 years experience Psychiatry
No: You only have to fast for a lipid panel to check your cholesterol & triglyceride levels, and for a fasting glucose level.
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1 thank
A 48-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Fasting is: Not required.
A 53-year-old member asked:
Dr. David Vanderkin
35 years experience Radiology
No: no not unless thet are looking at the arteries of the kidneys also
A 51-year-old member asked:
Dr. Ed Friedlander
43 years experience Pathology
Stop using drugs: Please forgive my frankness. The only way you can be confident of not having drug use detected by a pre-job urinalysis is to be clean. This isn't the ... Read More
A 25-year-old male asked:
Dr. Robert Killian
27 years experience General Practice
Eight to Twelve: Eight to twelve hours should suffice.
A 64-year-old female asked:
Dr. Ed Friedlander
43 years experience Pathology
No: Creatinine and BUN will change very little if you are non-fasting.
A 54-year-old member asked:
Dr. Calvin Weisberger
50 years experience Cardiology
Cholesterol: You don't feast to check for cholesterol. Recent studies suggest you might not need to fast either. Check with the lab you are using.
A 42-year-old member asked:
Dr. Armando E. Hernandez-Rey
Specializes in Fertility Medicine
Depends: Seek the care of an infertility specialist to address these concerns.
A 39-year-old member asked:
Dr. Allan Goldstein
55 years experience Internal Medicine
See doctor: You need full evaluation and treatment appropriate for you.
A 55-year-old member asked:
Dr. Donald Alves
23 years experience Emergency Medicine
Nothing: No significant impact on that kind of test.
A 43-year-old member asked:
Dr. Alan Wartenberg
48 years experience Addiction Medicine
Don't smoke: Cotinine persists for 3-5 days, depending on whether they are testing urine, blood or oral fluids. There are far more important reasons to stop smoki ... Read More
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1 thank
A 35-year-old male asked:
Dr. John Munshower
29 years experience Family Medicine
Not usually: Certain tests, for diagnosing reasons are recommended to fast for, such as the lipid panel and a diabetes test for your Blood sugar. Other tests may ... Read More
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1 thank
A 23-year-old female asked:
Dr. Dennis Higginbotham
29 years experience Obstetrics and Gynecology
No requirement: That can be done at any age but the over the counter pregnancy tests are quick, easy and just as accurate.
A 40-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Blood work: Most blood tests are performed at a lab. If there is a specific issue that you wish to have looked at - ask the provider who orders the labs. Take car ... Read More
A 41-year-old member asked:
Dr. Richard Bensinger
51 years experience Ophthalmology
Why: You can get this from ebay, or from a medical supply house. You would need a blood sample for it to give the proper data. Or is your goal to measure ... Read More
A 40-year-old male asked:
Dr. Nestor Del rosario
33 years experience Addiction Medicine
Opposite effect: I don't really know what is being tested but the problem with insulinomas are actually the drop in blood sugar after eating. The rise in blood sugar a ... Read More
1
1 thank

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

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Personalized answers
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