What causes high FT4 thyroid and low Total serum iron?

High FT4 thyroid and low Total serum iron can be caused by many reasons.

If your FT4 thyroid is in between 0.89 ng/dL and 1.76 ng/dL and your Total serum iron is in between 40 mcg/dL and 190 mcg/dL then you need not worry as these are the normal ranges for FT4 thyroid and Total serum iron 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	0.92311
5-10 years	0.95745
10-15 years	0.99307
15-20 years	1.03001
20-25 years	1.06833
25-30 years	1.10807
30-35 years	1.14929
35-40 years	1.19204
40-45 years	1.23638
45-50 years	1.28237
50-55 years	1.33007
55-60 years	1.37955
60-70 years	1.43087
70-80 years	1.4841
80-90 years	1.53931
90-100 years	1.59657
>100 years	1.65596

*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

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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 Total serum iron : 40 - 190 mcg/dL

Ideal values of Total serum iron depending on age :

Age	Ideal Total serum iron value
<5 years	41.488
5-10 years	43.031
10-15 years	44.632
15-20 years	46.292
20-25 years	48.014
25-30 years	49.8
30-35 years	51.653
35-40 years	53.574
40-45 years	55.567
45-50 years	57.634
50-55 years	59.778
55-60 years	62.002
60-70 years	64.308
70-80 years	66.7
80-90 years	69.181
90-100 years	71.755
>100 years	74.424

High FT4 thyroid and low Total serum iron can be caused by a lot of reasons. If you take FT4 thyroid and Total serum iron blood tests and the results are higher than 1.76 ng/dL for FT4 thyroid and lower than 40 mcg/dL for Total serum iron, 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 Total serum iron Tests Are Done :

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