“In India, we treat anemia but ignore iron deficiency without anemia. I see women with ferritin of 8 who are told they are "normal" because their hemoglobin is 12.1. They are exhausted and losing hair. Check ferritin, not just hemoglobin.”
— Truemark Health Editorial Team, Medically Reviewed by NABL-Certified Professionals
Iron Deficiency: India's Most Common Nutritional Problem
Iron deficiency is the most prevalent nutritional deficiency worldwide, and India bears a disproportionate burden. According to NFHS-5, 57% of Indian women aged 15–49 are anemic, with iron deficiency being the primary cause.
Iron is essential for hemoglobin production (oxygen transport), myoglobin (muscle oxygen storage), enzyme function, immune function, and brain development. Even mild iron deficiency — before anemia develops — can cause fatigue, reduced work capacity, and impaired cognitive function.
The body has no active mechanism to excrete excess iron, so iron balance depends entirely on intake and absorption. Women of reproductive age lose iron through menstruation (an average of 1 mg/day), making them particularly vulnerable to deficiency.
Iron Studies: Which Tests to Order
A complete iron panel includes Serum Iron, Ferritin, Total Iron Binding Capacity (TIBC), and Transferrin Saturation. Ferritin alone is often sufficient for screening, but the full panel is needed to characterize the type of iron disorder.
Ferritin is the best single test for iron stores. It reflects total body iron reserves. However, ferritin is also an acute-phase reactant — it rises during infection, inflammation, and liver disease, potentially masking underlying iron deficiency.
Serum Iron measures the amount of iron circulating in the blood bound to transferrin. It fluctuates throughout the day and is affected by recent meals, so it should be measured fasting in the morning. TIBC indicates how much transferrin is available to bind iron — it increases when iron stores are low.
Iron Studies Normal Ranges
Reference ranges for iron studies differ between men and women due to physiological differences. Women have lower ferritin levels due to menstrual iron losses.
While the lab reference range for ferritin in women starts at 10–12 ng/mL, many hematologists now recommend maintaining ferritin above 30 ng/mL for optimal energy and above 50 ng/mL for hair health. Ferritin below 30 with symptoms warrants iron supplementation.
Transferrin saturation (calculated as serum iron ÷ TIBC × 100) is a useful derived value. Normal is 20–50%. Below 20% suggests iron deficiency; above 45% may indicate iron overload (hemochromatosis).
Who Should Get Iron Studies Done?
All women of reproductive age should have ferritin checked annually. Pregnant women need iron monitoring at each trimester. Children aged 1–5, adolescents (especially girls), vegetarians/vegans, and endurance athletes are high-risk groups.
Get tested if you experience persistent fatigue, pallor, breathlessness on exertion, brittle nails, hair loss, restless leg syndrome, pica (craving non-food items like ice or clay), or recurrent infections.
Patients with chronic conditions like inflammatory bowel disease, celiac disease, chronic kidney disease, or heart failure should have regular iron studies. Post-surgical patients and regular blood donors are also at increased risk.
Normal Range Reference Table
| Parameter | Normal Range | Unit | High Indicates | Low Indicates |
|---|---|---|---|---|
| Serum Iron (Male) | 65–175 | μg/dL | — | Iron deficiency |
| Serum Iron (Female) | 50–170 | μg/dL | — | Iron deficiency |
| Ferritin (Male) | 20–250 | ng/mL | Iron overload, inflammation | Depleted iron stores |
| Ferritin (Female) | 10–120 | ng/mL | Iron overload, inflammation | Depleted iron stores |
| TIBC | 250–370 | μg/dL | Iron deficiency | Iron overload, inflammation |
| Transferrin Saturation | 20–50 | % | Iron overload | Iron deficiency |
| Hemoglobin (Female) | 12.0–15.5 | g/dL | — | Anemia |
| MCV | 80–100 | fL | — | Iron deficiency anemia (microcytic) |
Serum Iron (Male)
Serum Iron (Female)
Ferritin (Male)
Ferritin (Female)
TIBC
Transferrin Saturation
Hemoglobin (Female)
MCV
Frequently Asked Questions
What is the difference between iron deficiency and anemia?
Is fasting required for iron tests?
Can too much iron be harmful?
What are the best food sources of iron?
How long does it take to correct iron deficiency?
Truemark Health Editorial Team
Medically Reviewed by NABL-Certified Professionals
The Truemark Health Editorial Team produces evidence-based health content reviewed against current clinical guidelines, ICMR standards, and peer-reviewed research. Every article is vetted for medical accuracy before publication.
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