Is RDW SD 38.3 low, normal or dangerous? What does RDW SD level 38.3 mean?

📅 Medical Review Date: November 8, 2025

Your RDW SD level of 38.3 is a Low RDW SD level.

An RDW SD level of 38.3 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.

Important - Scroll to the end of this article to see how our patients managed their low RDW SD levels

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	40.494
5-10 years	42.045
10-15 years	43.655
15-20 years	45.327
20-25 years	45.26
25-30 years	45.193
30-35 years	45.127
35-40 years	45.06
40-45 years	44.994
45-50 years	44.928
50-55 years	44.862
55-60 years	44.796
60-70 years	44.731
70-80 years	44.665
80-90 years	44.6
90-100 years	44.534
>100 years	44.469

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

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1,51,150

Total number of patients treated

Important - Read more questions about low RDW SD levels after this video message

A video message on the treatment of your low RDW SD level

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Important - At the end of this article read how our patients treated their low RDW SD levels

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

Receive world-class medical opinion about your low RDW SD levels over email.Upload blood test report now

Important - At the end of this article read how our patients treated their low RDW SD levels

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	40.539
5-10 years	42.138
10-15 years	43.8
15-20 years	45.528
20-25 years	45.457
25-30 years	45.386
30-35 years	45.315
35-40 years	45.245
40-45 years	45.175
45-50 years	45.105
50-55 years	45.034
55-60 years	44.964
60-70 years	44.894
70-80 years	44.824
80-90 years	44.754
90-100 years	44.685
>100 years	44.616

Also Read :Symptoms of Low RDW SD

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

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

Symptoms

Medically Reviewed By

Dr. Hernandez, MD

BOARD CERTIFIED PATHOLOGIST

Laboratory Medicine Specialist

View Full Profile & Credentials →

Laboratory Expertise:

Clinical Pathology Certification
15+ years lab analysis experience
Specializes in test interpretation
Medical Advisory Board Member

Medical Disclaimer: This information is for educational purposes and should not replace professional medical advice. Consult your physician for diagnosis and treatment. Read full disclaimer.

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