What does high FT4 thyroid and Cystatin c mean in blood test?

High FT4 thyroid and Cystatin c can be caused by numerous problems.

High levels of FT4 thyroid and Cystatin c 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 Cystatin c level is between 0.62 ng/dL to 1.03 mg/L, then your body does not have any underlying health problems. But if FT4 thyroid and Cystatin c 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	0.94865
5-10 years	1.01117
10-15 years	1.07781
15-20 years	1.14884
20-25 years	1.22455
25-30 years	1.30525
30-35 years	1.39127
35-40 years	1.48295
40-45 years	1.58068
45-50 years	1.68485
50-55 years	1.67753
55-60 years	1.67025
60-70 years	1.663
70-80 years	1.65578
80-90 years	1.64859
90-100 years	1.75723
>100 years	1.7496

*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 Cystatin c range : 0.62 - 1.03 mg/L

Age-wise ideal Cystatin c level in blood:

Age	Ideal Cystatin c value
<5 years	0.661
5-10 years	0.705
10-15 years	0.751
15-20 years	0.8
20-25 years	0.853
25-30 years	0.909
30-35 years	0.969
35-40 years	0.965
40-45 years	1.029
45-50 years	1.025
50-55 years	1.021
55-60 years	1.016
60-70 years	1.012
70-80 years	1.008
80-90 years	1.003
90-100 years	0.999
>100 years	0.995

High FT4 thyroid and Cystatin c 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 1.03 mg/L for Cystatin c, 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 Cystatin c test. In most hospitals FT4 thyroid and Cystatin c 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.