What causes high FT3 thyroid and low RDW?

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

If your FT3 thyroid is in between 2.3 pg/mL and 4.2 pg/mL and your RDW is in between 11.6 % and 14 % then you need not worry as these are the normal ranges for FT3 thyroid and RDW 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	2.371
5-10 years	2.444
10-15 years	2.519
15-20 years	2.597
20-25 years	2.677
25-30 years	2.759
30-35 years	2.844
35-40 years	2.932
40-45 years	3.022
45-50 years	3.115
50-55 years	3.211
55-60 years	3.31
60-70 years	3.412
70-80 years	3.517
80-90 years	3.625
90-100 years	3.737
>100 years	3.852

*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 RDW : 11.6 - 14 %

Ideal values of RDW depending on age :

Age	Ideal RDW value
<5 years	11.957
5-10 years	12.325
10-15 years	12.705
15-20 years	13.096
20-25 years	13.499
25-30 years	13.915
30-35 years	13.902
35-40 years	13.889
40-45 years	13.876
45-50 years	13.862
50-55 years	13.849
55-60 years	13.836
60-70 years	13.823
70-80 years	13.81
80-90 years	13.797
90-100 years	13.784
>100 years	13.771

High FT3 thyroid and low RDW can be caused by a lot of reasons. If you take FT3 thyroid and RDW blood tests and the results are higher than 4.2 pg/mL for FT3 thyroid and lower than 11.6 % for RDW, 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 RDW Tests Are Done :

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