Iron deficiency is the most prevalent nutritional disorder in the world, affecting an estimated 2 billion people — and children are the most vulnerable group. According to the World Health Organization, approximately 40% of children under 5 globally are anaemic, with iron deficiency being the primary cause.

In India, the situation is particularly acute. The National Family Health Survey (NFHS-5) found that 67% of children aged 6–59 months are anaemic. This is not simply a number — iron deficiency in early childhood has measurable, lasting consequences on cognitive development, immune function, and physical growth.

Iron plays a central role in the production of haemoglobin, the protein in red blood cells that carries oxygen. When iron stores are depleted, the body cannot produce enough healthy red blood cells, leading to fatigue, reduced immunity, and impaired brain function. Children who are iron-deficient during the critical brain development years (birth to age 3) may experience deficits in attention, learning, and emotional regulation that persist even after iron levels are restored.

The early signs of iron deficiency are often subtle and easily missed. Parents should watch for: unusual pallor (pale inner eyelids, pale gums, pale nail beds), fatigue and reduced stamina, frequent infections, decreased appetite, poor concentration and irritability, and — in more severe cases — pica (craving and eating non-food items like mud or chalk).

The most effective prevention strategy is dietary. Haem iron — found in meat, poultry, and fish — is the most bioavailable form and is absorbed at a rate of 15–35%. Non-haem iron from plant foods is absorbed at a lower rate (2–20%) but can be significantly enhanced by consuming it alongside vitamin C-rich foods. For example, serving dal with a squeeze of lemon, or having orange with iron-rich breakfast cereals, can nearly double iron absorption.

Key iron-rich foods for Indian children include: moong dal, masoor dal, toor dal, rajma, chana, palak (spinach), methi leaves, ragi (finger millet), sesame seeds, pomegranate, and jaggery. For non-vegetarian children, chicken, fish, and eggs are excellent sources of highly bioavailable haem iron.

Factors that inhibit iron absorption include: calcium (from dairy) consumed at the same meal, tannins in tea and coffee, phytates in whole grains, and excess zinc. This does not mean avoiding these foods — it means being strategic about meal timing. A glass of milk is best consumed separately from an iron-rich meal.

The WHO recommends universal iron supplementation for children under 5 in high-prevalence regions. Parents should consult their paediatrician before supplementing, as iron overdose can be harmful. Dietary intervention should always be the first line of prevention.