Iron does quiet, essential work inside your child's body — carrying oxygen to every cell, building the myelin that coats nerve fibres, and supplying the raw material for dopamine, a chemical the brain needs for focus and learning. When iron levels drop, that work slows down, often before any outward sign appears. The good news is that most iron deficiency in children is preventable, and understanding a few key principles of feeding and timing makes a real difference.
Iron deficiency is the leading cause of anaemia worldwide, responsible for an estimated more than half of all anaemia cases globally, according to the WHO. Globally, 40% of children aged 6 to 59 months — roughly 269 million children — are affected by anaemia. In the WHO South-East Asia region alone, that figure is 83 million children. In Nepal, the 2022 Nepal Demographic and Health Survey found that approximately 43% of children under five are anaemic, down from 52.6% in 2016 — a meaningful improvement, but still a high proportion.
The reason infants and toddlers are especially at risk comes down to growth rate. Between 6 and 24 months, a child's blood volume expands rapidly, which creates an unusually high demand for iron relative to body size. A full-term breastfed infant typically has sufficient iron stores for approximately the first six months of life. After that point, many infants have exhausted those stores and become entirely dependent on dietary iron to keep up with demand. If complementary foods introduced at six months are not iron-rich, the gap opens quickly. Children born to mothers with anaemia face an added layer of risk: a 2025 analysis of Nepali NDHS data found that children of anaemic mothers were 2.43 times more likely to have anaemia themselves.
Iron is not only a blood mineral — it is a brain mineral. During early childhood, it supports three processes that are foundational to cognitive development: neurometabolism (the brain's energy supply), myelination (the insulation of nerve pathways that determines how fast signals travel), and the production of dopamine, which underlies attention, motivation, and learning. Research tracking children who had iron deficiency in infancy shows that effects on cognitive function, motor skills, and social-emotional development can persist into school age and adolescence, even after iron levels have been corrected.
A 2023 systematic review and meta-analysis of 13 randomised controlled trials found that iron supplementation significantly improved intelligence, attention and concentration, and memory in school-age children. The effect was notably larger in children who had started with anaemia. A separate study found that children who had iron deficiency anaemia in infancy showed slower reaction times and reduced inhibitory control at age 10 — consistent with lasting effects on brain circuits — even years after receiving iron therapy. This is not cause for concern if your child has had low iron; it is a reason to act promptly when it is identified and to prioritise prevention from the start.
Iron deficiency is often silent in its early stages. By the time symptoms become noticeable, levels may already have been low for some time. That said, there are signs that, when they appear together or persist over several weeks, are worth bringing to your doctor or health worker — especially in children between six months and three years.
- Paleness at the inner eyelid (conjunctiva), palms, or nail beds
- Tiredness or low energy that seems out of proportion to activity
- Irritability, fussiness, or restlessness without an obvious cause
- Poor appetite or reduced interest in food
- Reduced attention span or difficulty staying engaged
- Breathlessness during ordinary play
It is worth knowing that pallor — visible paleness — has limited reliability as a diagnostic sign on its own. Skin tone varies naturally between children, and pallor can be easy to miss. Noticing pallor at the inner eyelid is more consistent than checking the skin alone, but even this should prompt a visit for a blood test rather than a conclusion. Only a haemoglobin and serum ferritin measurement can confirm iron deficiency anaemia. The WHO's 2024 updated threshold defines anaemia in children aged 6 to 23 months as a haemoglobin level below 10.5 g/dL, and in children aged 24 to 59 months as below 11.0 g/dL.
Iron in food comes in two forms. Heme iron, found in meat, fish, and poultry, is absorbed at around 25 to 30% efficiency — the body takes it up readily. Non-heme iron, found in legumes, dark leafy vegetables, eggs, and fortified grains, is absorbed at roughly 10% efficiency under ordinary conditions. For families whose diet is largely plant-based, as is common across Nepal and South Asia, the combination strategy below makes a practical difference.
- Iron-rich foods to offer regularly: lentils (dal), chickpeas, kidney beans, dark leafy greens such as spinach (palak) and methi, eggs, small amounts of chicken, fish, or meat where available, and iron-fortified cereals or porridge
- Pair with vitamin C at every iron-rich meal: tomato, amla (gooseberry), citrus, bell pepper, or even a small amount of lime juice. About 50 mg of vitamin C — roughly a small glass of orange juice or a few pieces of amla — can double or triple non-heme iron absorption and can also counteract the inhibiting effect of tannins
- Introduce iron-rich complementary foods at six months: WHO recommends starting complementary feeding at six months and identifies consumption of iron-rich or iron-fortified foods as one of its core indicators for young child feeding
Tannins in tea form insoluble complexes with iron in the intestine, substantially reducing non-heme iron absorption at that meal. This is particularly relevant in South Asian households where chai is a daily staple. Tea should not be given to children under two years of age, and for older children it is worth keeping tea away from iron-rich meals — drinking it between meals avoids the absorption conflict.
Cow's milk contains very little iron — approximately 0.5 mg per litre — and its calcium and casein content actively inhibit iron absorption from other foods eaten at the same meal. Large volumes of milk also displace iron-rich solid foods from a child's diet. Whole cow's milk is not recommended as a main drink for infants under 12 months. After 12 months, keeping intake to around 400 to 500 mL per day leaves room in the diet for the solid foods that supply iron.
The American Academy of Pediatrics recommends universal haemoglobin screening for all infants at 12 months, with additional screening possible from 1 to 3 years if risk factors are present. For exclusively breastfed infants, the AAP also notes that oral iron supplementation may be recommended from around four months of age, continuing until iron-rich complementary foods are reliably part of the diet — the right approach, including how much and for how long, is something to decide with your child's doctor or health worker rather than starting on your own.
In Nepal, several public health programs directly address iron deficiency in young children. The Baal Vita micronutrient powder program distributes sachets containing 10 mg of iron along with 14 other micronutrients to children aged 6 to 23 months through Female Community Health Volunteers, every six months. In Achham district, the program was associated with a 33% reduction in moderate and severe anaemia at endline. Nepal also runs a twice-yearly vitamin A supplementation drive alongside albendazole deworming for children aged 6 to 59 months — deworming matters because intestinal parasites worsen iron loss. Ask your FCHV or health post whether your child is enrolled in these programs.
For settings where anaemia prevalence is above 40% — which includes Nepal — WHO recommends universal daily oral iron supplementation for children from six months of age as a public health intervention. This is a population-level recommendation; individual supplementation decisions should still be guided by a health professional based on your child's diet, growth, and test results.
One of the most straightforward ways to support a newborn's iron stores requires no action at all after birth: delayed cord clamping. WHO recommends waiting at least one minute after delivery before clamping the umbilical cord, allowing continued blood transfer from the placenta to the newborn. This has been shown to improve infant iron status for up to six months after birth. If you are planning a birth in a facility, it is a reasonable question to raise with your midwife or doctor in advance.
Prevention works best when it is layered: delayed cord clamping at birth, iron-rich complementary foods from six months, vitamin C pairing at meals, tea kept away from mealtimes, appropriate milk volumes after 12 months, routine screening at one year, and participation in community programs. Each of these steps is individually modest; together they substantially reduce the likelihood of a child's iron stores running low during the years when it matters most for the developing brain.