What causes high Vitamin B12 and low RDW?

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

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your RDW is in between 11.6 % and 14 % then you need not worry as these are the normal ranges for Vitamin B12 and RDW 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	214.604
5-10 years	218.269
10-15 years	221.997
15-20 years	225.789
20-25 years	229.645
25-30 years	233.567
30-35 years	237.556
35-40 years	241.613
40-45 years	245.74
45-50 years	249.937
50-55 years	254.206
55-60 years	258.548
60-70 years	262.964
70-80 years	267.455
80-90 years	272.023
90-100 years	276.669
>100 years	281.395

*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 RDW : 11.6 - 14 %

Ideal values of RDW depending on age :

Age	Ideal RDW value
<5 years	11.798
5-10 years	12
10-15 years	12.205
15-20 years	12.413
20-25 years	12.625
25-30 years	12.841
30-35 years	13.06
35-40 years	13.283
40-45 years	13.51
45-50 years	13.741
50-55 years	13.976
55-60 years	13.972
60-70 years	13.968
70-80 years	13.964
80-90 years	13.96
90-100 years	13.955
>100 years	13.951

High Vitamin B12 and low RDW can be caused by a lot of reasons. If you take Vitamin B12 and RDW blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 11.6 % for RDW, 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 RDW Tests Are Done :

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