Iron Profile Explained: Ferritin, TIBC and Why 'Normal Haemoglobin' Isn't Enough

Here's something many people don't know: you can be significantly iron deficient while your haemoglobin still reads 'normal'. Iron stores empty first; haemoglobin falls last. The Iron Profile catches the problem at the store-depletion stage — before full-blown anaemia.

The Three Key Measurements

Ferritin — Your Iron Savings Account

Ferritin reflects stored iron. It's the earliest marker of deficiency:

• Low ferritin = stores running out, even if haemoglobin is fine
• Symptoms like fatigue, hair fall and restless legs often appear at this stage
• Caveat: ferritin rises with inflammation, so it's read alongside CRP/ESR context

Serum Iron — Cash in Hand

The iron circulating in your blood right now. Fluctuates through the day, which is why it's never interpreted alone.

TIBC — The Transport Capacity

Total Iron Binding Capacity measures transferrin, the protein that carries iron. In deficiency, the body makes more transport capacity (high TIBC) hoping to grab every bit of iron — a classic pattern.

Reading the Patterns

• Low ferritin + low iron + high TIBC = true iron deficiency
• Normal/high ferritin + low iron + low TIBC = likely inflammation, not iron shortage — treating with iron here doesn't help

This distinction is exactly why the full profile beats guesswork or unsupervised iron supplements.

Who Should Get an Iron Profile?

• Women with heavy periods or persistent fatigue
• Vegetarians with low energy
• Anyone with hair fall or brittle nails
• Athletes and frequent blood donors
• Anyone whose CBC shows small (low MCV) red cells

The Iron Profile is included in Yourlab's Advanced Full Body Checkups and the Women's Health Package — home collection and reports within 24 hours, booked in one WhatsApp message.