What causes high Vitamin B12 and low RDW SD?

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

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your RDW SD is in between 39 fL and 46 fL then you need not worry as these are the normal ranges for Vitamin B12 and RDW SD 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	214.735
5-10 years	218.536
10-15 years	222.404
15-20 years	226.341
20-25 years	230.347
25-30 years	234.424
30-35 years	238.573
35-40 years	242.796
40-45 years	247.093
45-50 years	251.467
50-55 years	255.918
55-60 years	260.448
60-70 years	265.058
70-80 years	269.75
80-90 years	274.525
90-100 years	279.384
>100 years	284.329

*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 SD : 39 - 46 fL

Ideal values of RDW SD depending on age :

Age	Ideal RDW SD value
<5 years	39.69
5-10 years	40.393
10-15 years	41.108
15-20 years	41.836
20-25 years	42.576
25-30 years	43.33
30-35 years	44.097
35-40 years	44.878
40-45 years	45.672
45-50 years	45.657
50-55 years	45.643
55-60 years	45.629
60-70 years	45.615
70-80 years	45.6
80-90 years	45.586
90-100 years	45.572
>100 years	45.558

High Vitamin B12 and low RDW SD can be caused by a lot of reasons. If you take Vitamin B12 and RDW SD blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 39 fL for RDW SD, 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 SD Tests Are Done :

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