Iron deficiency clinic overview: ferritin targets, non-anaemic ID, oral vs IV iron, pregnancy and kids

Primary speaker

Dr Joel Collins — clinical haematologist; practice principal of an outpatient iron infusion / haematology & oncology clinic originating in Toowoomba and expanded to Brisbane and the Gold Coast. Introduced as leading one of the larger specialised outpatient iron and anaemia services in Australia.

Session context

Otter id TU82xA4pC5HGHdKhBO4c0g3sUGc · title Iron Deficiency Clinic Overview · ~47 min · multi-speaker Q&A after the main talk. Full transcript re-exported 2026-09-17 after a prior zero-byte inbox file.

Key messages for GPs

• Iron deficiency is common, undertreated, and often complicated — especially in women and children.
• About one in three women meet a ferritin <30 criterion; menstrual loss is the usual driver, including bleeding patients call “normal.”
• Lab reference ranges lag clinical thresholds. Healthy adult males often sit with ferritins well under 200; menopause tends to raise women’s ferritins toward that pattern. Treat the physiology, not only the printed interval.
• Practical therapy framing in the talk: aim for ferritin above ~50 in adults and children when intervening; Medicare coverage for iron therapy was discussed around that cut-off.
• Non-anaemic iron deficiency is real — iron is needed for mitochondrial electron transport, not only haemoglobin.
• Order iron studies, not ferritin alone. Inflammation (heart failure, CKD, metabolic disease, PCOS) can sequester iron.
• Oral products need enough elemental iron (~≥60 mg); “gentle” 5 mg products are essentially dietary noise.
• Pregnancy iron demand surges (blood volume ↑30–50%; second/third trimester needs far above baseline) — optimise preconception.

Why iron deficiency is under-recognised

Dr Collins opened by noting how often iron deficiency is undertreated or unrecognised, and how metabolic factors make the picture less simple than a single ferritin number. Australian physiology hangs on to iron tightly. Population burden in women is driven mainly by menstrual bleeding; absorption capacity is partly genetically determined (hemochromatosis as the extreme over-absorber phenotype; poor absorbers also exist without classic coeliac disease).

Ferritin targets vs lab ranges

Adult males without liver disease or hemochromatosis typically run ferritins under ~200 — not because they “need more iron,” but because they lose little. After menopause, women’s ferritins tend to climb toward that male pattern. Reference intervals built on populations that include many iron-deficient women therefore sit too low for clinical comfort. The session’s intervention line was roughly: nobody — adult or child — should remain therapeutically iron-deficient once ferritin is under about 50, with funding/coverage discussion tied to that threshold.

Non-anaemic iron deficiency

Haemoglobin can look acceptable while stores and usable iron are not. Iron sits at the end of the mitochondrial electron transport chain; bodies “do not work” without iron outside haemoglobin. Soluble transferrin receptor was described as less helpful now because metabolic states confound it. Test iron studies comprehensively.

Inflammation and “iron in the wrong place”

In heart failure, diabetes, and other inflammatory/metabolic states, total body iron may not be low, but usable iron is locked away. Heart failure: ferritin <100 is treated as low in the talk’s framing. Advanced CKD (stages 4–5) was discussed with higher ferritin targets (order of 100–200). PCOS was named as a metabolically inflamed state. CRP does not catch every relevant comorbidity.

Menstrual and absorption history

Ask specifically about flooding, overnight changes, and being caught out at school or work. Many patients will not volunteer — “it’s been like this since I was 15.” Family patterns (sisters, mother) often mirror menstrual phenotype. Post-gastrectomy and Roux-en-Y bypass patients have major malabsorption and need planned surveillance.

Oral iron — elemental dose and tolerance

Inflammation down-regulates gut absorption. Better-tolerated formulations may cost more (~$100 over months was mentioned for one product class); cheaper ones more often cause GI upset. Critically: check the label for elemental iron. Products with ~5 mg elemental iron approximate a non-vegetarian diet’s noise and will not replete stores. Aim for at least ~60 mg elemental iron per the talk.

Pregnancy and preconception

Pregnancy can drop a “fine” ferritin of 100 to the teens by mid-gestation. Blood volume rises 30–50%; iron needs approach ~200% of non-pregnant baseline in the second trimester and ~300% in the third. Women starting pregnancy with ferritin ~35 run out quickly. Catch preconception screening visits to optimise stores early.

IV iron dosing pearls

Product licences differ: ferric carboxymaltose up to 1000 mg per sitting; another formulation discussed (derisomaltose-class) up to 1500 mg. No licence for arbitrary mega-doses beyond product rules. If haemoglobin is <100 g/L, patients may need ~2 g total iron to rebuild haemoglobin and stores. Adult 1000 mg carboxymaltose-class infusions were described over ~15 minutes; paediatric protocols in the clinic used weight-based dosing and faster infusion rates under experienced supervision.

Paediatrics

Printed paediatric ferritin reference ranges are often lower than adult ranges — which “doesn’t make sense” for growing children who still need iron for brain and body. Do not let a low-normal paediatric interval stop treatment when the clinical picture is iron deficiency.

Floor Q&A highlights

• Hair loss: no crisp literature cut-off named; pragmatic aim still above ~50.
• Bypass / gastrectomy: expect ongoing malabsorption; monitor regularly.
• >1000 mg in one infusion: limited by product licence (1000 vs 1500 depending on formulation).
• Kids’ ferritin ranges: often too low; treat the child, not only the interval.

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