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vitaminsHas Critical Values
Ferritin
Ferritin
Clinical Overview
Ferritin is the main iron storage protein and the best indicator of total body iron stores. Low ferritin is the earliest marker of iron deficiency, even before anemia develops.
Reference RangesWHO/IFCC standards
| Age Group | Sex | Reference Range | Unit | Notes |
|---|---|---|---|---|
| Adults (18–64) | Male | 20 – 250 | ng/mL | — |
| Adults (18–64) | Female | 10 – 120 | ng/mL | — |
| Elderly (65+) | All | 20 – 300 | ng/mL | — |
Also reported in: µg/L.
Critical (Panic) Values
Critical Low: < 5 ng/mL. Values outside these limits require immediate clinical attention.
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Related Topics
iron deficiencyanemiairon stores