Iron deficiency is a silent health crisis affecting women worldwide, and Australia is no exception. With anaemia being a late-stage indicator, many women suffer from its early symptoms, such as fatigue, poor concentration, and irritability, long before it's detected.
Iron is an essential mineral, playing a crucial role in our bodies' functioning. It's involved in the production of haemoglobin, which carries oxygen throughout our bodies, and is vital for DNA synthesis and muscle metabolism. Our bodies cannot produce iron, so getting enough through our diet is critical.
The situation in Australia is concerning. According to the World Health Organization, 30% of women aged 15-49 globally suffer from anaemia, and in Australia, 11% of non-pregnant women and 14% of pregnant women are anaemic. Aboriginal and Torres Strait Islander women are at even higher risk, with nearly half experiencing iron deficiency anaemia during pregnancy.
Australian teenage girls have median ferritin levels around 25 µg/L, indicating insufficient iron stores. Among women aged 18-39, a significant percentage have ferritin levels below 30 µg/L, often linked to heavy menstrual bleeding. The latest National Nutrition survey revealed a shocking statistic: women consume about 50% less iron than the recommended daily intake (RDI).
Teenage girls: RDI 15 mg/day vs actual ~9 mg/day
Women 19-50 years: RDI 18 mg/day vs actual ~8.5-9 mg/day
Pregnancy: RDI 27 mg/day (intake data unavailable)
The National Health and Medical Research Council (NHMRC) notes that vegetarians require 80% higher iron intake due to lower bioavailability.
So, why are women at such a high risk of iron deficiency? The leading cause is heavy menstrual bleeding, which can result in a significant loss of iron. Physiological demands during growth spurts, pregnancy, and athletic training also increase iron needs. Additionally, dietary patterns play a role, with many women relying on non-haem iron sources (like fortified cereals and grains) that have lower bioavailability compared to haem iron found in animal sources.
Diagnosing iron deficiency involves checking ferritin levels (below 30 µg/L indicates insufficient stores), and haemoglobin levels (below 120 g/L suggests anaemia). In complex cases, serum transferrin receptor and CRP tests may be considered.
General Practitioners (GPs) play a vital role in addressing this issue. They can screen and diagnose by asking women about fatigue, heavy menstrual bleeding, and dietary iron intake. Routine ferritin checks for women with symptoms or in high-risk groups are recommended. GPs can also educate patients on the different types of iron (haem and non-haem) and strategies to improve absorption. For example, pairing iron-rich foods with vitamin C, and limiting inhibitors like tea, coffee, and calcium around iron-rich meals.
Promoting iron-rich balanced meals is essential. Including lean red meat (up to 3-4 times per week) as part of a healthy diet can help meet iron intake recommendations. The Australian Dietary Guidelines advise up to 65g per day (a maximum of 455g cooked lean red meat per week). Encouraging a variety of iron-rich foods, such as seafood, legumes, leafy greens, nuts, and fortified cereals, is also beneficial.
GPs should prioritize high-risk groups, such as teenage girls (especially athletes), pregnant women, perimenopausal women, vegetarians/vegans, and Indigenous women. For these groups, education, early screening, dietary counselling, and supplementation are crucial.
Consideration of iron supplementation is important for those with diagnosed iron deficiency or at high risk. Collaboration with dietitians can further enhance patient outcomes.
In summary, iron deficiency is a common and often underdiagnosed issue among Australian women. Blood loss and low dietary iron intake are major contributors. Through screening, education, and tailored interventions, GPs can significantly improve the iron status of their female patients. The key is awareness, education, and collaboration to tackle this widespread health concern.
