What causes high FT3 thyroid and low Vitamin D?

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

If your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL and your Vitamin D is in between 75 nmol/L and 250 nmol/L then you need not worry as these are the normal ranges for FT3 thyroid and Vitamin D 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 FT3 thyroid : 2.3 - 4.2 pg/mL

Ideal values of FT3 thyroid depending on age :

Age	Ideal FT3 thyroid value
<5 years	2.382
5-10 years	2.467
10-15 years	2.555
15-20 years	2.646
20-25 years	2.74
25-30 years	2.838
30-35 years	2.939
35-40 years	3.044
40-45 years	3.152
45-50 years	3.264
50-55 years	3.38
55-60 years	3.5
60-70 years	3.625
70-80 years	3.754
80-90 years	3.888
90-100 years	4.026
>100 years	4.169

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

If you want your blood test report to be interpreted by FT3 thyroid specialist, then you can upload your report. Our FT3 thyroid 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 FT3 thyroid levels include:

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

If you want your blood test report to be interpreted by FT3 thyroid specialist, you can upload your report. Our FT3 thyroid 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 Vitamin D : 75 - 250 nmol/L

Ideal values of Vitamin D depending on age :

Age	Ideal Vitamin D value
<5 years	77.67
5-10 years	80.435
10-15 years	83.298
15-20 years	86.263
20-25 years	89.334
25-30 years	92.514
30-35 years	95.807
35-40 years	99.218
40-45 years	102.75
45-50 years	106.408
50-55 years	110.196
55-60 years	114.119
60-70 years	118.182
70-80 years	122.389
80-90 years	126.746
90-100 years	131.258
>100 years	135.931

High FT3 thyroid and low Vitamin D can be caused by a lot of reasons. If you take FT3 thyroid and Vitamin D blood tests and the results are higher than 4.2 pg/mL for FT3 thyroid and lower than 75 nmol/L for Vitamin D, 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 FT3 thyroid and Vitamin D Tests Are Done :

If your doctor wants FT3 thyroid and Vitamin D tests on you, you may need to go through these tests. During the FT3 thyroid and Vitamin D 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 FT3 thyroid and Vitamin D Test reports by your pathologist.

Medical References

• MedlinePlus – Triiodothyronine (T3) Tests
• Cleveland Clinic – Triiodothyronine (T3) Test: What It Is, Function & Levels
• MedlinePlus – T3 test
• WebMD – T3 Tests: T3 Uptake Levels, Common Thyroid Conditions, and More
• NIH – How to interpret thyroid function tests