Is FT4 thyroid 1.66 normal, high or low? What does Free thyroxine level 1.66 mean?

Your FT4 thyroid level of 1.66 is a Normal FT4 thyroid level.

High levels of FT4 thyroid in the blood indicate a variety of health problems. If your blood FT4 thyroid level is between 0.89 ng/dL and 1.76 ng/dL, you probably do not have an underlying health problem. But if FT4 thyroid levels are not in this range, you should see a doctor immediately.

Important - Go to the end of this article and read how our patients treated their normal FT4 thyroid levels 

Normal range of FT4 thyroid found among men : 0.89 - 1.76 ng/dL

Ideal values of FT4 thyroid depending on age (male) :
Age Ideal FT4 thyroid value
<5 years 0.90477
5-10 years 0.91979
10-15 years 0.93506
15-20 years 0.95058
20-25 years 0.96636
25-30 years 0.9824
30-35 years 0.99871
35-40 years 1.01529
40-45 years 1.03214
45-50 years 1.04927
50-55 years 1.06669
55-60 years 1.0844
60-70 years 1.1024
70-80 years 1.1207
80-90 years 1.1393
90-100 years 1.15821
>100 years 1.17744

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

A video message on the treatment of your normal FT4 thyroid level

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

Click here to know Symptoms of Low FT4 thyroid

Besides Lab test failures, there are many other reasons for inaccurate blood results. Know the common reasons for inaccurate blood test results

Normal range of FT4 thyroid found among women : 0.89-1.76 ng/dL

Ideal values of FT4 thyroid depending on age (female) :
Age Ideal FT4 thyroid value
<5 years 0.90522
5-10 years 0.9207
10-15 years 0.93644
15-20 years 0.95245
20-25 years 0.96873
25-30 years 0.98529
30-35 years 1.00214
35-40 years 1.01927
40-45 years 1.0367
45-50 years 1.05443
50-55 years 1.07246
55-60 years 1.0908
60-70 years 1.10945
70-80 years 1.12842
80-90 years 1.14771
90-100 years 1.16733
>100 years 1.18729

Click here to know Symptoms of Low FT4 thyroid

Click here to upload your blood test report

If you take a FT4 thyroid blood test and the results are not in the normal range (0.89-1.76 ng/dL), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

Some examples of conditions that increase or decrease FT4 thyroid levels include:

Receive world-class medical opinion about your normal FT4 thyroid levels over email. Upload blood test report now

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How the FT4 thyroid Test Is Done :

If your doctor wants FT4 thyroid test on you, you may need a FT4 thyroid blood test. During the FT4 thyroid blood test, 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 Test report by your pathologist.

Click here to upload your blood test report

Symptoms

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