What causes high RDW SD and low Ferritin?

high RDW SD

High RDW SD and low Ferritin can be caused by many reasons.

If your RDW SD is in between 39 fL and 46 fL 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 RDW SD and Ferritin respectively. But if your levels are lesser or greater than the above values, then there may be some problem in your body.

Important - Go to the end of this article and read how our patients treated their RDW SD levels 

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Normal range of RDW SD : 39 - 46 fL

Ideal values of RDW SD depending on age :
Age Ideal RDW SD value
<5 years 39.675
5-10 years 40.362
10-15 years 41.061
15-20 years 41.772
20-25 years 42.495
25-30 years 43.231
30-35 years 43.979
35-40 years 44.74
40-45 years 45.514
45-50 years 45.501
50-55 years 45.488
55-60 years 45.474
60-70 years 45.46
70-80 years 45.446
80-90 years 45.433
90-100 years 45.419
>100 years 45.405

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

If you want your blood test report to be interpreted by RDW SD specialist, then you can upload your report. Our RDW SD 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

RDW SD treatment - Click to read 10 GOLDEN ARTICLES on Anemia

Some examples of conditions that increase or decrease RDW SD levels include:

  • Thalassemia, an inherited blood disorder
  • Crohn's disease
  • Chronic liver disease
  • An iron or vitamin deficiency
  • Heart disease

If you want your blood test report to be interpreted by RDW SD specialist, you can upload your report. Our RDW SD 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 Ferritin : 22 - 322 ng/mL

Ideal values of Ferritin depending on age :
Age Ideal Ferritin value
<5 years 22.381
5-10 years 22.768
10-15 years 23.162
15-20 years 23.563
20-25 years 23.971
25-30 years 24.386
30-35 years 24.808
35-40 years 25.237
40-45 years 25.674
45-50 years 26.118
50-55 years 26.57
55-60 years 27.03
60-70 years 27.498
70-80 years 27.974
80-90 years 28.458
90-100 years 28.951
>100 years 29.452

High RDW SD and low Ferritin can be caused by a lot of reasons. If you take RDW SD and Ferritin blood tests and the results are higher than 46 fL for RDW SD 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 RDW SD and Ferritin Tests Are Done :

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

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Dr. Dwayne Michaels
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Dr. Dwayne Michaels
Guest Author
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