What causes high Vitamin B12 and low BUN?

High Vitamin B12 and low BUN can be caused by many reasons.

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your BUN is in between 6 mg/dL and 20 mg/dL then you need not worry as these are the normal ranges for Vitamin B12 and BUN respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Normal range of Vitamin B12 : 211 - 911 pg/mL

Ideal values of Vitamin B12 depending on age :

Age	Ideal Vitamin B12 value
<5 years	214.674
5-10 years	218.411
10-15 years	222.214
15-20 years	226.083
20-25 years	230.019
25-30 years	234.024
30-35 years	238.098
35-40 years	242.243
40-45 years	246.46
45-50 years	250.751
50-55 years	255.117
55-60 years	259.559
60-70 years	264.078
70-80 years	268.676
80-90 years	273.354
90-100 years	278.113
>100 years	282.955

*Ideal values are calculated based on our database of patient records

If you want your blood test report to be interpreted by Vitamin B12 specialist, then you can upload your report. Our Vitamin B12 expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

1,37,160

Total number of patients treated

Some examples of conditions that increase or decrease Vitamin B12 levels include:

• Crohn disease
• Ulcerative colitis
• Celiac disease
• Reduced stomach acid production
• Pancreatic insufficiency

If you want your blood test report to be interpreted by Vitamin B12 specialist, you can upload your report. Our Vitamin B12 expert will provide you with the most accurate interpretation of your blood test results and treatment within 12 hours. Upload blood test report now

Normal range of BUN : 6 - 20 mg/dL

Ideal values of BUN depending on age :

Age	Ideal BUN value
<5 years	6.104
5-10 years	6.21
10-15 years	6.318
15-20 years	6.428
20-25 years	6.54
25-30 years	6.654
30-35 years	6.77
35-40 years	6.888
40-45 years	7.008
45-50 years	7.13
50-55 years	7.254
55-60 years	7.38
60-70 years	7.508
70-80 years	7.639
80-90 years	7.772
90-100 years	7.907
>100 years	8.045

High Vitamin B12 and low BUN can be caused by a lot of reasons. If you take Vitamin B12 and BUN blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 6 mg/dL for BUN, your physician may recommend more tests to figure out the problem. You might also get these tests if your physician thinks you have some other disease.

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How the Vitamin B12 and BUN Tests Are Done :

If your doctor wants Vitamin B12 and BUN tests on you, you may need to go through these tests. During the Vitamin B12 and BUN blood tests, a pathologist will put a needle into your veins and take out a small quantity of blood. A pathologist is a physician in the medical field who thoroughly studies the causes and effects of disease. Within a few hours you will get your Vitamin B12 and BUN Test reports by your pathologist.

Medical References

• WebMD – Vitamin B12 Blood Test: Uses, Normal Range, and Results
• NIH – Vitamin B12 - Health Professional Fact Sheet
• MedlinePlus – Vitamin B12 level