What causes high BUN and low Vitamin B12?

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

If your BUN is in between 6 mg/dL and 20 mg/dL and your Vitamin B12 is in between 211 pg/mL and 911 pg/mL then you need not worry as these are the normal ranges for BUN and Vitamin B12 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 BUN : 6 - 20 mg/dL

Ideal values of BUN depending on age :

Age	Ideal BUN value
<5 years	6.063
5-10 years	6.127
10-15 years	6.192
15-20 years	6.257
20-25 years	6.323
25-30 years	6.39
30-35 years	6.457
35-40 years	6.525
40-45 years	6.594
45-50 years	6.664
50-55 years	6.734
55-60 years	6.805
60-70 years	6.877
70-80 years	6.949
80-90 years	7.022
90-100 years	7.096
>100 years	7.171

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

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

Ideal values of Vitamin B12 depending on age :

Age	Ideal Vitamin B12 value
<5 years	213.224
5-10 years	215.471
10-15 years	217.742
15-20 years	220.037
20-25 years	222.356
25-30 years	224.7
30-35 years	227.068
35-40 years	229.461
40-45 years	231.88
45-50 years	234.324
50-55 years	236.794
55-60 years	239.29
60-70 years	241.812
70-80 years	244.361
80-90 years	246.937
90-100 years	249.54
>100 years	252.17

High BUN and low Vitamin B12 can be caused by a lot of reasons. If you take BUN and Vitamin B12 blood tests and the results are higher than 20 mg/dL for BUN and lower than 211 pg/mL for Vitamin B12, 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 BUN and Vitamin B12 Tests Are Done :

If your doctor wants BUN and Vitamin B12 tests on you, you may need to go through these tests. During the BUN and Vitamin B12 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 BUN and Vitamin B12 Test reports by your pathologist.