Your lab work showed low iron or ferritin and your doctor mentioned possible anemia. It is completely normal to feel uneasy when a result comes back flagged and you are not sure what it means for your health.
Here is what these results actually measure and what they mean for you, in plain English — so you can walk into your next appointment informed instead of anxious.
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Iron vs ferritin — what’s the difference?
Iron is the actual mineral circulating in your blood right now; ferritin is your body’s stored iron, like a savings account.
Ferritin often drops before iron does, making it an earlier warning sign.
Normal ranges
Ferritin
Low: under 15–20 ng/mL (women), under 30 ng/mL (men). Normal: 20–200 ng/mL (women), 30–300 ng/mL (men). High: above the normal range (can indicate inflammation, not just iron overload).
Serum Iron
Normal 60–170 mcg/dL; low below 60 mcg/dL.
TIBC (Total Iron Binding Capacity)
Often elevated when iron is low, as your body tries to capture more iron.
Common causes of low iron
•Heavy menstrual periods
•Pregnancy
•Poor dietary intake
•Gastrointestinal bleeding (needs investigation)
•Frequent blood donation
•Poor absorption (celiac disease, certain GI conditions)
Symptoms of iron deficiency
•Fatigue
•Pale skin
•Shortness of breath
•Cold hands and feet
•Brittle nails
•Unusual cravings for ice or dirt (called pica)
Red flags — when to call your doctor
Ferritin below 10
Iron deficiency in men or postmenopausal women (warrants a GI investigation for a bleeding source)
Significant fatigue affecting daily life
Blood in the stool together with low iron
If you have severe symptoms such as chest pain, trouble breathing, fainting or confusion do not wait for a callback — call 911 or go to the nearest emergency room.
Questions to ask your doctor
1How low are my iron and ferritin, and what is causing them to drop?
2Do I have iron deficiency anemia or just low iron stores?
3Should I take an iron supplement, and if so which kind and for how long?
4Do I need any further tests to find the source of the iron loss?
5Are there dietary changes that would help raise my iron levels?
6When should I repeat these tests to see if my levels are improving?
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Medical disclaimer: This page is educational and is not medical advice, diagnosis or treatment. Test results must be interpreted by a licensed healthcare provider who knows your full history. Always follow your provider’s guidance and call 911 in an emergency.