Ferritin Blood Test: Understanding Your Iron Stores
Ferritin measures how much iron your body stores. Normal levels are about 20–300 ng/mL in men and 15–150 ng/mL in women. Low levels indicate iron deficiency, while high levels suggest iron overload or inflammation.
Contents
Result interpretation Ferritin
What your result means based on common reference ranges
Ferritin is within range, indicating adequate iron stores and normal red blood cell production.
Slight elevation reflects mild inflammation or increased iron storage without immediate risk.
Significantly high levels indicate iron overload or chronic disease requiring medical evaluation.
Low ferritin shows depleted iron stores and a high risk of iron deficiency anemia.
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What is Ferritin?
Ferritin is a protein that stores iron inside cells and releases it when needed. A ferritin blood test reflects the total amount of iron reserves in your body, making it a reliable indicator of long-term iron status. Unlike serum iron, which fluctuates throughout the day, ferritin remains relatively stable. This makes it one of the most sensitive markers for detecting iron deficiency early, before anemia develops, as well as identifying iron overload or inflammatory conditions.
Reference ranges
Causes of abnormal values
Causes of low Ferritin
- • Iron deficiency anemia — depleted stores due to insufficient intake
- • Heavy menstrual bleeding — ongoing blood loss reduces iron levels
- • Pregnancy — increased demand for fetal development
- • Gastrointestinal bleeding — chronic internal blood loss
- • Malabsorption disorders — reduced iron absorption in the gut
Causes of high Ferritin
- • Hemochromatosis — genetic condition causing excessive iron absorption
- • Chronic inflammation — increases ferritin as part of immune response
- • Liver disease — damaged liver releases stored ferritin
- • Hyperthyroidism — accelerates metabolism and ferritin production
- • Frequent blood transfusions — introduces excess iron into the body
- • Excess alcohol consumption — increases iron absorption and liver stress
Ferritin in combination with other markers
Possible symptoms
- •Persistent fatigue and weakness
- •Dizziness or lightheadedness
- •Pale skin
- •Shortness of breath during activity
- •Heart palpitations
- •Joint or abdominal pain (with high ferritin)
When to see a doctor
Consult a doctor if ferritin is below 15 ng/mL or above 500 ng/mL. Seek evaluation if abnormal results persist or are accompanied by fatigue, weakness, or other symptoms. Borderline values with symptoms also require attention.
What to do if abnormal
- Consult a doctor for interpretation
- Check hemoglobin, serum iron, and transferrin saturation
- Adjust diet or take supplements only if prescribed
- Investigate sources of blood loss or inflammation
- Repeat test in 2–3 months to monitor changes
The information on this page is intended for general understanding of test results and does not replace medical consultation. Accurate interpretation requires considering other blood markers and individual factors.
Content is based on medical literature and used within the PulseBook analytical system.
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