What causes high Vitamin B12 and low HbA1c?

High Vitamin B12 and low HbA1c can be caused by many reasons.

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your HbA1c is in between 4 % and 5.7 % then you need not worry as these are the normal ranges for Vitamin B12 and HbA1c 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	214.623
5-10 years	218.308
10-15 years	222.056
15-20 years	225.869
20-25 years	229.747
25-30 years	233.692
30-35 years	237.704
35-40 years	241.785
40-45 years	245.936
45-50 years	250.159
50-55 years	254.454
55-60 years	258.823
60-70 years	263.267
70-80 years	267.787
80-90 years	272.385
90-100 years	277.062
>100 years	281.819

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

Normal range of HbA1c : 4 - 5.7 %

Ideal values of HbA1c depending on age :

Age	Ideal HbA1c value
<5 years	4.069
5-10 years	4.139
10-15 years	4.21
15-20 years	4.282
20-25 years	4.356
25-30 years	4.431
30-35 years	4.507
35-40 years	4.584
40-45 years	4.663
45-50 years	4.743
50-55 years	4.824
55-60 years	4.907
60-70 years	4.991
70-80 years	5.077
80-90 years	5.164
90-100 years	5.253
>100 years	5.343

High Vitamin B12 and low HbA1c can be caused by a lot of reasons. If you take Vitamin B12 and HbA1c blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 4 % for HbA1c, 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 HbA1c Tests Are Done :

If your doctor wants Vitamin B12 and HbA1c tests on you, you may need to go through these tests. During the Vitamin B12 and HbA1c 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 HbA1c 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