What causes high Vitamin B12 and low FT3 thyroid?

High Vitamin B12 and low FT3 thyroid can be caused by many reasons.

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL then you need not worry as these are the normal ranges for Vitamin B12 and FT3 thyroid 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	214.69
5-10 years	218.445
10-15 years	222.266
15-20 years	226.153
20-25 years	230.108
25-30 years	234.133
30-35 years	238.228
35-40 years	242.395
40-45 years	246.634
45-50 years	250.948
50-55 years	255.337
55-60 years	259.803
60-70 years	264.347
70-80 years	268.97
80-90 years	273.674
90-100 years	278.461
>100 years	283.331

*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 FT3 thyroid : 2.3 - 4.2 pg/mL

Ideal values of FT3 thyroid depending on age :

Age	Ideal FT3 thyroid value
<5 years	2.34
5-10 years	2.381
10-15 years	2.423
15-20 years	2.465
20-25 years	2.508
25-30 years	2.552
30-35 years	2.597
35-40 years	2.642
40-45 years	2.688
45-50 years	2.735
50-55 years	2.783
55-60 years	2.832
60-70 years	2.882
70-80 years	2.932
80-90 years	2.983
90-100 years	3.035
>100 years	3.088

High Vitamin B12 and low FT3 thyroid can be caused by a lot of reasons. If you take Vitamin B12 and FT3 thyroid blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 2.3 pg/mL for FT3 thyroid, 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 FT3 thyroid Tests Are Done :

If your doctor wants Vitamin B12 and FT3 thyroid tests on you, you may need to go through these tests. During the Vitamin B12 and FT3 thyroid 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 FT3 thyroid 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