What causes high FT4 thyroid and low Vitamin D?

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

If your FT4 thyroid is in between 0.89 ng/dL and 1.76 ng/dL 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 FT4 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 FT4 thyroid : 0.89 - 1.76 ng/dL

Ideal values of FT4 thyroid depending on age :

Age	Ideal FT4 thyroid value
<5 years	0.92168
5-10 years	0.95449
10-15 years	0.98847
15-20 years	1.02366
20-25 years	1.0601
25-30 years	1.09784
30-35 years	1.13692
35-40 years	1.17739
40-45 years	1.21931
45-50 years	1.26272
50-55 years	1.30767
55-60 years	1.35422
60-70 years	1.40243
70-80 years	1.45236
80-90 years	1.50406
90-100 years	1.5576
>100 years	1.61305

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

If you want your blood test report to be interpreted by FT4 thyroid specialist, then you can upload your report. Our FT4 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 FT4 thyroid levels include:

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

If you want your blood test report to be interpreted by FT4 thyroid specialist, you can upload your report. Our FT4 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 FT4 thyroid and low Vitamin D can be caused by a lot of reasons. If you take FT4 thyroid and Vitamin D blood tests and the results are higher than 1.76 ng/dL for FT4 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 FT4 thyroid and Vitamin D Tests Are Done :

If your doctor wants FT4 thyroid and Vitamin D tests on you, you may need to go through these tests. During the FT4 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 FT4 thyroid and Vitamin D Test reports by your pathologist.