What causes high Cystatin c and low FT4 thyroid?

High Cystatin c and low FT4 thyroid can be caused by many reasons.

If your Cystatin c is in between 0.62 mg/L and 1.03 mg/L and your FT4 thyroid is in between 0.89 ng/dL and 1.76 ng/dL then you need not worry as these are the normal ranges for Cystatin c and FT4 thyroid 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 Cystatin c : 0.62 - 1.03 mg/L

Ideal values of Cystatin c depending on age :

Age	Ideal Cystatin c value
<5 years	0.642
5-10 years	0.664
10-15 years	0.687
15-20 years	0.711
20-25 years	0.736
25-30 years	0.762
30-35 years	0.789
35-40 years	0.817
40-45 years	0.846
45-50 years	0.876
50-55 years	0.907
55-60 years	0.939
60-70 years	0.972
70-80 years	1.006
80-90 years	1.005
90-100 years	1.004
>100 years	1.003

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

If you want your blood test report to be interpreted by Cystatin c specialist, then you can upload your report. Our Cystatin c 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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Some examples of conditions that increase or decrease Cystatin c levels include:

• Impaired kidney function
• Diabetes
• Obstructive sleep apnea
• Metabolic syndrome
• Heart disease

If you want your blood test report to be interpreted by Cystatin c specialist, you can upload your report. Our Cystatin c 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 FT4 thyroid : 0.89 - 1.76 ng/dL

Ideal values of FT4 thyroid depending on age :

Age	Ideal FT4 thyroid value
<5 years	0.92115
5-10 years	0.95339
10-15 years	0.98676
15-20 years	1.0213
20-25 years	1.05705
25-30 years	1.09405
30-35 years	1.13234
35-40 years	1.17197
40-45 years	1.21299
45-50 years	1.25544
50-55 years	1.29938
55-60 years	1.34486
60-70 years	1.39193
70-80 years	1.44065
80-90 years	1.49107
90-100 years	1.54326
>100 years	1.59727

High Cystatin c and low FT4 thyroid can be caused by a lot of reasons. If you take Cystatin c and FT4 thyroid blood tests and the results are higher than 1.03 mg/L for Cystatin c and lower than 0.89 ng/dL for FT4 thyroid, 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 Cystatin c and FT4 thyroid Tests Are Done :

If your doctor wants Cystatin c and FT4 thyroid tests on you, you may need to go through these tests. During the Cystatin c and FT4 thyroid 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 Cystatin c and FT4 thyroid Test reports by your pathologist.