What causes high Vitamin B12 and low Ferritin?

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

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your Ferritin is in between 22 ng/mL and 322 ng/mL then you need not worry as these are the normal ranges for Vitamin B12 and Ferritin respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

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

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

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

Ideal values of Vitamin B12 depending on age :

Age	Ideal Vitamin B12 value
<5 years	214.652
5-10 years	218.368
10-15 years	222.148
15-20 years	225.993
20-25 years	229.905
25-30 years	233.885
30-35 years	237.934
35-40 years	242.053
40-45 years	246.243
45-50 years	250.505
50-55 years	254.841
55-60 years	259.252
60-70 years	263.74
70-80 years	268.305
80-90 years	272.949
90-100 years	277.674
>100 years	282.481

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

Normal range of Ferritin : 22 - 322 ng/mL

Ideal values of Ferritin depending on age :

Age	Ideal Ferritin value
<5 years	22.381
5-10 years	22.768
10-15 years	23.162
15-20 years	23.563
20-25 years	23.971
25-30 years	24.386
30-35 years	24.808
35-40 years	25.237
40-45 years	25.674
45-50 years	26.118
50-55 years	26.57
55-60 years	27.03
60-70 years	27.498
70-80 years	27.974
80-90 years	28.458
90-100 years	28.951
>100 years	29.452

High Vitamin B12 and low Ferritin can be caused by a lot of reasons. If you take Vitamin B12 and Ferritin blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 22 ng/mL for Ferritin, 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 Ferritin Tests Are Done :

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