What causes high Vitamin B12 and low MCV?

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

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your MCV is in between 83 fL and 101 fL then you need not worry as these are the normal ranges for Vitamin B12 and MCV 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	214.598
5-10 years	218.257
10-15 years	221.978
15-20 years	225.763
20-25 years	229.612
25-30 years	233.527
30-35 years	237.509
35-40 years	241.559
40-45 years	245.678
45-50 years	249.867
50-55 years	254.127
55-60 years	258.46
60-70 years	262.867
70-80 years	267.349
80-90 years	271.907
90-100 years	276.543
>100 years	281.258

*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 MCV : 83 - 101 fL

Ideal values of MCV depending on age :

Age	Ideal MCV value
<5 years	84.415
5-10 years	85.854
10-15 years	87.318
15-20 years	88.807
20-25 years	90.321
25-30 years	91.861
30-35 years	93.427
35-40 years	95.02
40-45 years	96.64
45-50 years	98.288
50-55 years	99.964
55-60 years	99.935
60-70 years	99.906
70-80 years	99.877
80-90 years	99.848
90-100 years	99.819
>100 years	99.79

High Vitamin B12 and low MCV can be caused by a lot of reasons. If you take Vitamin B12 and MCV blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 83 fL for MCV, 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 MCV Tests Are Done :

If your doctor wants Vitamin B12 and MCV tests on you, you may need to go through these tests. During the Vitamin B12 and MCV 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 MCV 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