Is RDW SD 32 low, normal or dangerous? What does RDW SD level 32 mean?

📅 Medical Review Date: December 22, 2025

Your RDW SD level of 32 is a Low RDW SD level.

An RDW SD level of 32 fL usually means red blood cells are uniform in size. It suggests normal red blood cell production. Low levels of RDW SD typically do not cause specific symptoms and are often normal. This can be seen in healthy individuals with no blood disorders. Further tests are often needed to identify the cause and guide appropriate treatment.

Low RDW SD levels may indicate underlying health problems. The normal range is typically between 39 fL and 46 fL. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal RDW SD range for men is :39 - 46 fL

Ideal values of RDW SD depending on age (male) :

Age	Ideal RDW SD value
<5 years	40.248
5-10 years	41.536
10-15 years	42.865
15-20 years	44.237
20-25 years	45.653
25-30 years	45.606
30-35 years	45.559
35-40 years	45.512
40-45 years	45.465
45-50 years	45.419
50-55 years	45.372
55-60 years	45.326
60-70 years	45.279
70-80 years	45.233
80-90 years	45.186
90-100 years	45.14
>100 years	45.093

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

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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

Normal range of RDW SD found among women :39-46 fL

Ideal values of RDW SD depending on age (female) :

Age	Ideal RDW SD value
<5 years	40.285
5-10 years	41.613
10-15 years	42.985
15-20 years	44.402
20-25 years	45.865
25-30 years	45.815
30-35 years	45.765
35-40 years	45.715
40-45 years	45.666
45-50 years	45.616
50-55 years	45.567
55-60 years	45.518
60-70 years	45.468
70-80 years	45.419
80-90 years	45.37
90-100 years	45.32
>100 years	45.271

If you take a RDW SD blood test and the results are not in the normal range (39-46 fL), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the RDW SD Test Is Done :

When your doctor orders a RDW SD test, it involves a straightforward blood draw to measure your RDW SD levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your RDW SD test results are usually available within a few hours.

Medical References

• MedlinePlus – RDW (Red Cell Distribution Width)
• Cleveland Clinic – RDW Blood Test: What It Is, Procedure & Results
• NIH – RDW-SD is Superior to RDW-CV in Reflecting Liver Fibrosis Stage in Patients with Chronic Hepatitis B

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