What causes high Vitamin D and low FT4 thyroid?

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

If your Vitamin D is in between 75 nmol/L and 250 nmol/L 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 D 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 D : 75 - 250 nmol/L

Ideal values of Vitamin D depending on age :

Age	Ideal Vitamin D value
<5 years	76.313
5-10 years	77.648
10-15 years	79.007
15-20 years	80.39
20-25 years	81.797
25-30 years	83.228
30-35 years	84.684
35-40 years	86.166
40-45 years	87.674
45-50 years	89.208
50-55 years	90.769
55-60 years	92.357
60-70 years	93.973
70-80 years	95.618
80-90 years	97.291
90-100 years	98.994
>100 years	100.726

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

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

• Liver disease
• Celiac disease
• Your body isn’t properly absorbing or using vitamin D.
• Crohn's disease
• Kidney disease

If you want your blood test report to be interpreted by Vitamin D specialist, you can upload your report. Our Vitamin D 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 D and low FT4 thyroid can be caused by a lot of reasons. If you take Vitamin D and FT4 thyroid blood tests and the results are higher than 250 nmol/L for Vitamin D 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 D and FT4 thyroid Tests Are Done :

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

Medical References

• MedlinePlus – Vitamin D Test
• MedlinePlus – 25-hydroxy vitamin D test
• Mayo Clinic – 2425D - Overview: 25-Hydroxyvitamin D:24,25-Dihydroxyvitamin D Ratio, Serum