Ferritin vs Haemoglobin: Why Anaemia Tests Can Miss Iron Loss (Video)

Transcript

Hidden Iron Loss

Ever wonder why a normal haemoglobin can still hide iron loss? Let’s unpack the hidden story.

Normal Hb ≠ Iron

You’ve probably heard, ‘Your haemoglobin is normal, you’re not anaemic.’ Yet many people who feel exhausted and losing hair still have iron deficiency. The clue often sits a line down in the report, unnoticed.

At a Glance

Haemoglobin shows the oxygen-carrying protein right now. Ferritin reflects the body’s stored iron reserve. Ferritin usually drops before haemoglobin, acting as an early warning. Normal ferritin ranges are about 15-150 ng/mL for women and 20-250 ng/mL for men, though labs differ.

Hb vs Ferritin

Haemoglobin tells you what’s flowing in your blood at this moment, the iron-rich protein inside red cells that carries oxygen. When it falls enough, you’re classified as anaemic, and that’s what most routine tests look for. Ferritin, on the other hand, measures how much iron you’ve stored in the liver, spleen and bone marrow. Think of haemoglobin as the fuel in the engine and ferritin as the reserve tank in the boot.

Low Ferritin, Normal Hb

When ferritin is low but haemoglobin stays normal, people often feel a subtle fatigue that doesn’t match sleep or workload. Hair may shed more than usual, sometimes only noticed months after the iron stores have slipped. Restless legs at night and brittle, even spoon-shaped nails can appear. This pattern is called iron deficiency without anaemia and is common among women with heavy periods, vegetarians, frequent donors and those recovering from pregnancy.

Reading Ferritin

To read ferritin correctly, first check the reference range printed on your lab report, because labs vary. A level under about 15 ng/mL usually signals depleted stores. Many clinicians start treating symptoms when ferritin is under 30 ng/mL, even if it’s not technically deficient. High ferritin, roughly above 150-300 ng/mL depending on sex and lab, also needs a doctor’s review.

Traditional Wisdom

Traditional Unani and Ayurvedic practices didn’t have ferritin tests, but they watched for pallor, fatigue, weak nails and hair loss as signs the blood needed rebuilding. They used iron-rich foods, jaggery and tonics over weeks. The modern lesson is the same: restoring depleted stores takes consistent iron intake for several weeks, not just one fort meal.

Inflammation Trap

Ferritin is also an acute-phase reactant, meaning it can rise during infection or inflammation even when iron stores are low. So a person with a cold or chronic inflammation might show a ‘normal’ ferritin that actually masks a deficiency. Doctors often look at other markers like CRP, transferrin saturation or total iron binding capacity alongside ferritin to get the full picture.

Key Quote

A normal haemoglobin only tells you the tank isn’t empty yet.

Myth Debunked

Many think a normal haemoglobin means iron is fine, but that only rules out current anaemia. Iron stores can be low for months before the haemoglobin drops. This stage, iron deficiency without anaemia, is recognised and common, and a routine CBC won’t catch it.

When to See Doctor

Don’t start iron supplements on your own just from symptoms or an online report. Unchecked iron can cause constipation, nausea and, in rare cases like haemochromatosis, dangerous overload. See a doctor promptly if you have very heavy periods, black or tarry stools, unexplained weight loss with fatigue, or chest pain and breathlessness. Pregnant women should also get professional guidance.

Take Care

For more details, read the full post on thecareonline.com, remember this isn’t medical advice.