What causes high FT3 thyroid and low Total serum iron?

High FT3 thyroid and low Total serum iron can be caused by many reasons.

If your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL 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 FT3 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 FT3 thyroid : 2.3 - 4.2 pg/mL

Ideal values of FT3 thyroid depending on age :

Age	Ideal FT3 thyroid value
<5 years	2.386
5-10 years	2.475
10-15 years	2.567
15-20 years	2.662
20-25 years	2.761
25-30 years	2.864
30-35 years	2.971
35-40 years	3.082
40-45 years	3.197
45-50 years	3.316
50-55 years	3.439
55-60 years	3.567
60-70 years	3.7
70-80 years	3.838
80-90 years	3.981
90-100 years	4.129
>100 years	4.124

*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 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 FT3 thyroid and low Total serum iron can be caused by a lot of reasons. If you take FT3 thyroid and Total serum iron blood tests and the results are higher than 4.2 pg/mL for FT3 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 FT3 thyroid and Total serum iron Tests Are Done :

If your doctor wants FT3 thyroid and Total serum iron tests on you, you may need to go through these tests. During the FT3 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 FT3 thyroid and Total serum iron 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