Question 1

my bun level is 16mg/dl  and my creatinine 0.62 mg/dl normals but bun/creatinine is 26.1 should i be worried? i was fasting.  other blood & urine ok!

Accepted Answer

Nope: The ratio is high due to a relative increase in the BUN with a perfectly normal cr. You may have been a bit dehydrated with the fast. No issue here.

Question 2

gfr46prior over years in50s&also normal-this is lowest i've hadcreat1.2;normal bun;a1c5.7;fbs83;low blood press;dec gfr51;both fasting>12hours;advice?

Accepted Answer

Need more info: If it‘s solated low GFR, and you‘re otherwise healthy (with normal urine studies and maybe ultrasound) all that needs to be done is continued monitoring. Because even if you do have chronic disease, the mainstay of treatment is to control blood pressure, which you say is low. I have not seen anyone worked up for isolated low GFR that revealed anything after expensive tests. What says your doctor?

Question 3

bun creatinine high in fasting blood work. what are the causes?

Accepted Answer

BUN and creatinine: If you have high BUN and creatinine levels, you may be dehydrated or you may have chronic kidney disease. Ask the physician who ordered the blood test for an opinion as to the cause of the high levels in the blood. The physician knows the patient best and can give a more meaningful answer to your question. Good luck.

Question 4

should i be concerned with a bun of 24, a creatinine of 1.10 and bun/creatinine ration of 21.8? fasting lab (10 hours) except 1 cup black coffee 2 hours prior?

Accepted Answer

: What was eGFR?  Best would be to do a 24 hr urine for GFR.  If you have hypertension add urine Na and K.  If these are not at DASH goal then discuss with your team about DASHing.

Question 5

bun/creatine ratio is 24.was fasting and hydrated. creatine alone is 0.73 just slightly low. have liver disease. why ratio high?

Accepted Answer

BUN Cr. Ratio: is useful in the differential diagnosis of acute or chronic renal disease. Reduced renal perfusion, e.g., congestive heart failure, or recent onset of urinary tract obstruction will result in an increase in BUN/Creatinine ratio. Increased urea formation also results in an increase in the ratio, e.g., gastrointestinal bleeding, trauma, etc. When there decreased urea in liver disease, ratio is low.

Question 6

what does it mean when my bun creatinine ratio is 8.9? is this bad? my ast was 13 u/l, should i be concerned? unintentional fasting before testing.

Accepted Answer

Ratio: If the BUN is elevated out of proportion to the creatinine, it could signify dehydration or bleeding into the intestinal tract. Your ratio appears to be normal. The normal BUN  is up to 20 and the creatinine is up to about 1.2(ratio close to 20).

Question 7

2 y.o female has normal bun(8mg/dl)&creatinine(0.23mg/dl) but bun/creatinine ratio is abnormal at 35. why is this? fasting blood glucose is also 134.

Accepted Answer

Bun and creatinine: Do not worry about ratio of bun/cr. Bun is affected by many factors, hydration status, protein intake, muscle mass, whether on any hormone supplement. In this case, the creatine is quite low which is not necessarily a problem. Glucose can normally be higher in young children, so not a problem. A pediatrician or endocrinologist can tell you more if fasting glucose of 134 in a 2 yr old is a problem?

Question 8

my blood urea is 26 mg/dl and my creatinine is 1.1 (12hrs fasting).  i am 49yr old healthy male.  my bun:creatinine ratio appears to be high.clarify.?

Accepted Answer

Dehydration?: Your creatinine is normal, the slight elevation in BUN may be due to dehydration associated with fasting. Ask you doctor for an estimated glomerular filtration rate, and discuss repeating the test after adequate hydration.

Question 9

good morning doctors. i am a 62 year-old male. my albumin over creatine ratio is 62.. moderately increased. my egfr is 62. bun is 21. my fasting glucose is 93. is the albumin creatinine ratio something concerning?

Accepted Answer

: its a little high. Suggest see nephrologist

Question 10

how to reduce the high levels of bun uria?

Accepted Answer

Kidney or load: The BUN is a measure of the amount of nitrogen in the blood in the form of urea, and it is, thereby a measurement of renal function.  Thus, if one improve the renal function the BUN will go down.

Get Virtual Care

For Businesses

About Us

HealthTap Online Primary Care Doctors Accepting New Patients

Doctor answers about:

Does fasting affect bun levels

A member asked:

My bun level is 16mg/dl and my creatinine 0.62 mg/dl normals but bun/creatinine is 26.1 should i be worried? i was fasting. other blood & urine ok!

A member asked:

Gfr46prior over years in50s&also normal-this is lowest i've hadcreat1.2;normal bun;a1c5.7;fbs83;low blood press;dec gfr51;both fasting>12hours;advice?

A member asked:

Bun creatinine high in fasting blood work. what are the causes?

A member asked:

Should i be concerned with a bun of 24, a creatinine of 1.10 and bun/creatinine ration of 21.8? fasting lab (10 hours) except 1 cup black coffee 2 hours prior?

A member asked:

Bun/creatine ratio is 24.was fasting and hydrated. creatine alone is 0.73 just slightly low. have liver disease. why ratio high?

A member asked:

What does it mean when my bun creatinine ratio is 8.9? is this bad? my ast was 13 u/l, should i be concerned? unintentional fasting before testing.

A member asked:

2 y.o female has normal bun(8mg/dl)&creatinine(0.23mg/dl) but bun/creatinine ratio is abnormal at 35. why is this? fasting blood glucose is also 134.

A member asked:

My blood urea is 26 mg/dl and my creatinine is 1.1 (12hrs fasting). i am 49yr old healthy male. my bun:creatinine ratio appears to be high.clarify.?

A member asked:

Good morning doctors. i am a 62 year-old male. my albumin over creatine ratio is 62.. moderately increased. my egfr is 62. bun is 21. my fasting glucose is 93. is the albumin creatinine ratio something concerning?

A member asked:

How to reduce the high levels of bun uria?

HealthTap Online Primary Care Doctors Accepting New Patients

Telemedicine

Primary Care

Manage Your Conditions

Women's Health

Children's Health

Men's Health

Senior Health

Wellness, Prevention & Lifestyle

Sexual Health

Mental & Behavioral Health

Travel Medicine

Urgent Care

Didn't find what you're looking for?

More of what we treat

Allergies

Antibiotics

Asthma

High Blood Pressure

Prescriptions

Type 2 Diabetes

For Businesses

Company

Health Content

Join Us

Download HealthTap

Questions?