What causes high Vitamin B12 and low TSH 3?

High Vitamin B12 and low TSH 3 can be caused by many reasons.

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your TSH 3 is in between 0.55 uIU/mL and 4.78 uIU/mL then you need not worry as these are the normal ranges for Vitamin B12 and TSH 3 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	214.695
5-10 years	218.454
10-15 years	222.279
15-20 years	226.171
20-25 years	230.131
25-30 years	234.161
30-35 years	238.261
35-40 years	242.433
40-45 years	246.678
45-50 years	250.997
50-55 years	255.392
55-60 years	259.864
60-70 years	264.414
70-80 years	269.044
80-90 years	273.755
90-100 years	278.548
>100 years	283.425

*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 TSH 3 : 0.55 - 4.78 uIU/mL

Ideal values of TSH 3 depending on age :

Age	Ideal TSH 3 value
<5 years	0.56
5-10 years	0.57
10-15 years	0.58
15-20 years	0.59
20-25 years	0.6
25-30 years	0.611
30-35 years	0.622
35-40 years	0.633
40-45 years	0.644
45-50 years	0.655
50-55 years	0.666
55-60 years	0.678
60-70 years	0.69
70-80 years	0.702
80-90 years	0.714
90-100 years	0.727
>100 years	0.74

High Vitamin B12 and low TSH 3 can be caused by a lot of reasons. If you take Vitamin B12 and TSH 3 blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 0.55 uIU/mL for TSH 3, 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 TSH 3 Tests Are Done :

If your doctor wants Vitamin B12 and TSH 3 tests on you, you may need to go through these tests. During the Vitamin B12 and TSH 3 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 TSH 3 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