What causes high Vitamin B12 and low FT4 thyroid?

High Vitamin B12 and low FT4 thyroid can be caused by many reasons.

If your Vitamin B12 is in between 211 pg/mL and 911 pg/mL and your FT4 thyroid is in between 0.89 ng/dL and 1.76 ng/dL then you need not worry as these are the normal ranges for Vitamin B12 and FT4 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	214.693
5-10 years	218.45
10-15 years	222.273
15-20 years	226.163
20-25 years	230.121
25-30 years	234.148
30-35 years	238.246
35-40 years	242.415
40-45 years	246.657
45-50 years	250.973
50-55 years	255.365
55-60 years	259.834
60-70 years	264.381
70-80 years	269.008
80-90 years	273.716
90-100 years	278.506
>100 years	283.38

*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 FT4 thyroid : 0.89 - 1.76 ng/dL

Ideal values of FT4 thyroid depending on age :

Age	Ideal FT4 thyroid value
<5 years	0.90558
5-10 years	0.92143
10-15 years	0.93756
15-20 years	0.95397
20-25 years	0.97066
25-30 years	0.98765
30-35 years	1.00493
35-40 years	1.02252
40-45 years	1.04041
45-50 years	1.05862
50-55 years	1.07715
55-60 years	1.096
60-70 years	1.11518
70-80 years	1.1347
80-90 years	1.15456
90-100 years	1.17476
>100 years	1.19532

High Vitamin B12 and low FT4 thyroid can be caused by a lot of reasons. If you take Vitamin B12 and FT4 thyroid blood tests and the results are higher than 911 pg/mL for Vitamin B12 and lower than 0.89 ng/dL for FT4 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 FT4 thyroid Tests Are Done :

If your doctor wants Vitamin B12 and FT4 thyroid tests on you, you may need to go through these tests. During the Vitamin B12 and FT4 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 FT4 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