Iron Deficiency in Children: Signs, Testing and Food First
Iron deficiency in children is when the body does not have enough iron, the mineral it needs to make healthy red blood cells and carry oxygen around the body. It is one of the most common nutritional shortfalls in Australian children, and when it is more advanced it can lead to a type of anaemia.
Iron matters a great deal in the early years because it supports growth, energy, the immune system and brain development. Children grow quickly, so their iron needs are high relative to their size, and it is easy for intake to fall behind demand during growth spurts.
The good news is that iron deficiency is common, well understood and very treatable. In many children it can be improved through everyday food, and a GP can guide you on whether anything more is needed once the picture is clear.
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Mild iron deficiency often causes no obvious symptoms at all, which is part of why it can go unnoticed. As levels fall further, you might see tiredness, paleness (especially in the lips, gums and inner eyelids), irritability, or a child who seems to have less energy for play than usual.
Other clues include poor appetite, getting more frequent minor infections, being short of breath or breathing quickly with activity, and difficulty concentrating at school. Some children develop unusual cravings for non food items such as ice or dirt, which is always worth mentioning to a doctor.
None of these signs are unique to low iron. Ongoing tiredness can have many causes, and if your child also has aching legs it can overlap with everyday growing pains. A fever changes the picture, so our guide on when a child has a fever can help you tell things apart. That is exactly why guessing is not the answer, and why a GP review helps.
Fussy or selective eating is one of the most common reasons children run low on iron. A child who refuses meat, eats a narrow range of foods, or fills up on milk and snacks can easily miss out on iron rich options over weeks and months, even when they seem to eat plenty.
Toddlers are especially prone to this. Drinking large amounts of cow's milk can reduce appetite for iron rich foods and can also affect how iron is absorbed, so it is a frequent talking point at GP reviews for this age group.
Children on vegetarian or vegan diets can absolutely get enough iron, but it takes a little more planning, since plant iron is absorbed less readily. If you have wider concerns about foods and reactions, our guide to food allergy and intolerance testing explains how that is assessed properly rather than guessed.
For most children, food is the first and best place to start. Iron comes in two forms. The type found in red meat, poultry and fish is absorbed most easily, while the type in plant foods such as legumes, tofu, wholegrains, eggs, leafy greens and iron fortified cereals is absorbed less readily but still counts.
A helpful trick is to pair plant sources of iron with foods rich in vitamin C, such as tomato, capsicum, citrus or berries, at the same meal, which improves absorption. Offering iron rich foods regularly, and keeping cow's milk to sensible amounts, makes a real difference over time.
Small, consistent changes tend to work better than pressure at the table. Involving children in choosing and preparing food, and offering iron rich options repeatedly without a battle, helps fussy eaters come around gradually. A GP or dietitian can tailor this to your child.
You cannot diagnose iron deficiency by symptoms alone, so if a doctor is concerned they may arrange a blood test. This is always organised through a GP, who decides whether testing is appropriate, what to check, and how to read the results in the context of your child.
The test usually looks at iron stores and a full blood count. Our overview of the iron studies blood test explains what these markers mean. In children a doctor weighs up whether a test is worthwhile at all, since a needle is a bigger deal for a child, and a food first trial is sometimes the sensible first step.
If a test is arranged, you will be given a referral for a pathology collection. You can read how this works in our guide to whether you need a referral for a blood test, and Abby can arrange the referral and review the results with you.
Care that follows your child
Iron supplements as a class can be very useful when a child genuinely needs them, but they should only be started on the advice of a doctor and after the picture is clear, never as a routine just in case. Giving iron that is not needed offers no benefit and can cause problems.
There are good reasons for this caution. Too much iron can cause stomach upset and constipation, and iron products can be dangerous if a child takes more than intended, so any supplements must be kept well out of reach. The right choice, form and length of use all depend on the individual child.
For these reasons this article does not give doses or name specific products. If your child needs iron beyond food, a GP will advise on a safe and appropriate plan, arrange follow up to check it is working, and decide when it can stop. If a child ever swallows a large amount of iron, call 000.
Abby Health is an online-first clinic, so you can talk to an Australian doctor about your child's energy, appetite and iron from home, seven days a week. In one consult a doctor can weigh up the signs, suggest a food first plan, and decide whether a blood test is the right next step.
You can choose to see the same doctor each time, so results, food changes and any follow up all stay joined up rather than starting over each visit. If testing is needed, we can arrange the referral through our pathology service and review the results with you. To see how consults work for children, visit Abby for families and kids, or book through our family energy clinic. Bulk billed for eligible patients with a valid Medicare card. Strict eligibility criteria apply. This is general information only and not a substitute for personal medical advice; if your child is seriously unwell, call 000.
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