What causes high TSH 3 and low Vitamin B12?

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

If your TSH 3 is in between 0.55 uIU/mL and 4.78 uIU/mL and your Vitamin B12 is in between 211 pg/mL and 911 pg/mL then you need not worry as these are the normal ranges for TSH 3 and Vitamin B12 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 TSH 3 levels include:

• Liver disease
• Autoimmune disease
• A non-functioning thyroid gland
• Thyroiditis
• Diabetes

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	0.569
5-10 years	0.589
10-15 years	0.61
15-20 years	0.632
20-25 years	0.654
25-30 years	0.677
30-35 years	0.701
35-40 years	0.726
40-45 years	0.752
45-50 years	0.779
50-55 years	0.807
55-60 years	0.836
60-70 years	0.866
70-80 years	0.897
80-90 years	0.929
90-100 years	0.962
>100 years	0.996

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

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

Ideal values of Vitamin B12 depending on age :

Age	Ideal Vitamin B12 value
<5 years	218.469
5-10 years	226.203
10-15 years	234.211
15-20 years	242.502
20-25 years	251.087
25-30 years	259.975
30-35 years	269.178
35-40 years	278.707
40-45 years	288.573
45-50 years	298.788
50-55 years	309.365
55-60 years	320.317
60-70 years	331.656
70-80 years	343.397
80-90 years	355.553
90-100 years	368.14
>100 years	381.172

High TSH 3 and low Vitamin B12 can be caused by a lot of reasons. If you take TSH 3 and Vitamin B12 blood tests and the results are higher than 4.78 uIU/mL for TSH 3 and lower than 211 pg/mL for Vitamin B12, 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 TSH 3 and Vitamin B12 Tests Are Done :

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

Medical References

• MedlinePlus – TSH (Thyroid-stimulating hormone) Test
• Cleveland Clinic – TSH (Thyroid-Stimulating Hormone) Levels: Symptoms
• Mayo Clinic – Hypothyroidism (underactive thyroid) - Diagnosis and treatment
• NIH – Thyroid Tests
• NIH – How to interpret thyroid function tests