Ferritin: range, results, and biological age
Ferritin reflects stored iron, but it can rise during inflammation because it also behaves as an acute-phase reactant.
Quick answer
Low ferritin usually suggests depleted iron stores; high ferritin can reflect iron overload, inflammation, liver disease, alcohol, or metabolic stress.
What this marker captures
Ferritin reflects stored iron, but it is also an acute-phase reactant, meaning it can rise with inflammation or liver stress. Low ferritin is one of the clearest signs of depleted iron stores. High ferritin is more ambiguous: it may mean excess iron, but it can also rise from infection, chronic inflammation, fatty liver, alcohol, metabolic syndrome, or recent illness.
How to read the range
Ferritin ranges differ by sex, age, menstruation status, pregnancy, and lab method. A low value can matter even before anemia appears, especially if fatigue, restless legs, hair shedding, heavy periods, or low MCV are present. A high value should be interpreted with transferrin saturation, liver enzymes, hs-CRP, alcohol intake, metabolic markers, and family history before assuming iron overload.
What makes the result more meaningful
Ferritin becomes much more useful when paired with hemoglobin, MCV, RDW, transferrin saturation, hs-CRP, liver enzymes, and menstrual or donation history. Low ferritin plus low MCV and high RDW strongly suggests iron depletion. High ferritin plus high CRP may reflect inflammation. High ferritin plus high transferrin saturation raises a different question about iron loading and deserves clinical interpretation.
Tracking notes for longevity
Ferritin is not a direct PhenoAge or KDM input, but it shapes oxygen delivery, training tolerance, immune function, and red blood cell markers that influence biological age calculations. For tracking, do not optimize ferritin blindly. The useful target depends on sex, symptoms, inflammation, and iron indices. Recheck after supplementation, blood donation, dietary change, inflammation changes, or treatment of an identified cause.
Practical next checks
If ferritin is low, hemoglobin, MCV, RDW, iron saturation, menstrual history, gastrointestinal symptoms, diet, and blood donation history help explain the cause. If ferritin is high, hs-CRP, liver enzymes, alcohol intake, metabolic markers, and transferrin saturation are more useful than ferritin alone. SuperAge should make this distinction explicit because users often mistake ferritin for a simple iron tank, when inflammation can make the tank look falsely full.
Common mistake to avoid
The common mistake is treating ferritin as either always iron deficiency or always iron overload. Low ferritin is usually a strong iron-store signal, but high ferritin is much less specific because inflammation and liver stress can raise it. A useful page should separate low-ferritin logic from high-ferritin logic and explain why transferrin saturation, CRP, liver enzymes, and CBC markers matter.
What high results can mean
High ferritin can reflect inflammation, liver injury, alcohol use, metabolic syndrome, infection, or iron overload.
What low results can mean
Low ferritin often reflects low iron stores from inadequate intake, blood loss, heavy menstruation, malabsorption, or increased needs.
Why it matters for biological age
Ferritin is not a PhenoAge input, but iron balance affects energy, red blood cells, inflammation, and recovery.
How SuperAge uses this marker
SuperAge interprets ferritin with MCV, RDW, hemoglobin-related patterns, hs-CRP, training load, and recovery signals.
Common aliases
- Iron stores
- Serum ferritin
Sources
This page is educational and cannot diagnose a condition. Lab ranges vary by method, country, sex, age, pregnancy status, medication use, and clinical context. Discuss personal results with a qualified clinician.