What causes high Cystatin c and low Ferritin?

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

If your Cystatin c is in between 0.62 mg/L and 1.03 mg/L and your Ferritin is in between 22 ng/mL and 322 ng/mL then you need not worry as these are the normal ranges for Cystatin c and Ferritin respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Some examples of conditions that can increase or decrease Cystatin c levels include:

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

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	0.641
5-10 years	0.662
10-15 years	0.684
15-20 years	0.707
20-25 years	0.73
25-30 years	0.754
30-35 years	0.779
35-40 years	0.805
40-45 years	0.832
45-50 years	0.86
50-55 years	0.888
55-60 years	0.917
60-70 years	0.947
70-80 years	0.978
80-90 years	1.01
90-100 years	1.008
>100 years	1.007

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

Normal range of Ferritin : 22 - 322 ng/mL

Ideal values of Ferritin depending on age :

Age	Ideal Ferritin value
<5 years	22.728
5-10 years	23.48
10-15 years	24.257
15-20 years	25.06
20-25 years	25.889
25-30 years	26.746
30-35 years	27.631
35-40 years	28.546
40-45 years	29.491
45-50 years	30.467
50-55 years	31.475
55-60 years	32.517
60-70 years	33.593
70-80 years	34.705
80-90 years	35.854
90-100 years	37.041
>100 years	38.267

High Cystatin c and low Ferritin can be caused by a lot of reasons. If you take Cystatin c and Ferritin blood tests and the results are higher than 1.03 mg/L for Cystatin c and lower than 22 ng/mL for Ferritin, 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 Ferritin Tests Are Done :

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

Medical References

• Cleveland Clinic – Estimated Glomerular Filtration Rate (eGFR): Test & Levels
• MedlinePlus – Glomerular Filtration Rate (GFR) Test
• NIH – Serum cystatin C as a marker of renal function in detection of early acute kidney injury
• NIH – Incorporation of Cystatin C Testing in Clinical Practice: Real World Experience in Sweden