Is Total serum iron 21 low, normal or dangerous? What does Total serum iron level 21 mean?

📅 Medical Review Date: September 26, 2025

Your Total serum iron level of 21 is a Low Total serum iron level.

Low Total serum iron levels may indicate underlying health problems. The normal range is typically between 40 mcg/dL and 190 mcg/dL. 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 Total serum iron range for men is :40 - 190 mcg/dL

Ideal values of Total serum iron depending on age (male) :

Age	Ideal Total serum iron value
<5 years	40.84
5-10 years	41.698
10-15 years	42.574
15-20 years	43.468
20-25 years	44.381
25-30 years	45.313
30-35 years	46.265
35-40 years	47.237
40-45 years	48.229
45-50 years	49.242
50-55 years	50.276
55-60 years	51.332
60-70 years	52.41
70-80 years	53.511
80-90 years	54.635
90-100 years	55.782
>100 years	56.953

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

Get Advice via Email : Send us your blood test report, and our Total serum iron experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides Total serum iron, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

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Some examples of conditions that increase or decrease Total serum iron levels include:

• Anemia
• Your body doesn’t have enough healthy red blood cells
• Iron overload
• Iron poisoning
• Gastrointestinal blood loss

Receive world-class medical opinion about your low Total serum iron levels over email.Upload blood test report now

Normal range of Total serum iron found among women :40-190 mcg/dL

Ideal values of Total serum iron depending on age (female) :

Age	Ideal Total serum iron value
<5 years	40.865
5-10 years	41.749
10-15 years	42.652
15-20 years	43.575
20-25 years	44.518
25-30 years	45.481
30-35 years	46.465
35-40 years	47.47
40-45 years	48.497
45-50 years	49.546
50-55 years	50.618
55-60 years	51.713
60-70 years	52.832
70-80 years	53.975
80-90 years	55.142
90-100 years	56.335
>100 years	57.554

If you take a Total serum iron blood test and the results are not in the normal range (40-190 mcg/dL), 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 Total serum iron Test Is Done :

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

Medical References

• MedlinePlus – Serum iron test
• Cleveland Clinic – Iron Blood Test: What It Is & Results
• NIH – Serum iron, ferritin, transferrin, total iron binding capacity

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