What does high FT4 thyroid and TIBC mean in blood test?

High FT4 thyroid and TIBC can be caused by numerous problems.

High levels of FT4 thyroid and TIBC in the blood indicate a variety of health problems. If your blood FT4 thyroid level is between 0.89 ng/dL to 1.76 ng/dL and the TIBC level is between 250 ng/dL to 450 mcg/dL, then your body does not have any underlying health problems. But if FT4 thyroid and TIBC levels exceed these levels, you should see a doctor immediately.

Normal FT4 thyroid range : 0.89 - 1.76 ng/dL

Age-wise ideal FT4 thyroid level in blood:

Age	Ideal FT4 thyroid value
<5 years	0.94972
5-10 years	1.01345
10-15 years	1.08145
15-20 years	1.15402
20-25 years	1.23145
25-30 years	1.31408
30-35 years	1.40225
35-40 years	1.49634
40-45 years	1.59674
45-50 years	1.70388
50-55 years	1.69621
55-60 years	1.68858
60-70 years	1.68097
70-80 years	1.6734
80-90 years	1.66587
90-100 years	1.65837
>100 years	1.65091

*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

1,37,160

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 TIBC range : 250 - 450 mcg/dL

Age-wise ideal TIBC level in blood:

Age	Ideal TIBC value
<5 years	266.775
5-10 years	284.676
10-15 years	303.778
15-20 years	324.162
20-25 years	345.913
25-30 years	369.124
30-35 years	393.892
35-40 years	420.322
40-45 years	448.526
45-50 years	446.506
50-55 years	444.496
55-60 years	442.495
60-70 years	440.502
70-80 years	438.519
80-90 years	436.545
90-100 years	434.579
>100 years	432.622

High FT4 thyroid and TIBC levels in the blood can cause a number of health problems. Your GP may recommend follow-up tests to get an important picture of your overall health and well-being. If the results are greater than 1.76 ng/dL for FT4 thyroid and more than 450 mcg/dL for TIBC, you may also need some follow-up tests that will help detect the underlying disease early.

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How is a blood test performed in the lab?

Depending on the symptoms you are experiencing, your doctor may order a FT4 thyroid and TIBC test. In most hospitals FT4 thyroid and TIBC results can be obtained within three to six hours after blood is taken. The blood is usually drawn from a vein on the inside of the elbow or the back of the hand. Drink plenty of water before your appointment. If you experience any symptoms that you are concerned about are out of the ordinary, call your doctor immediately.