In a government school in rural Telangana or an urban slum in Hyderabad, morning assembly is often interrupted by a familiar thud. A girl, usually around 14 or 15, suddenly faints. She likely has had a full plate of rice for dinner and a packet of biscuits for breakfast. Yet, she faints, because of a sudden fall in the oxygen level in her blood. This is not a one-off case, but a common phenomenon in many south Indian states.

States like Telangana, Tamil Nadu, Karnataka, Kerala, and Andhra Pradesh boast of the highest GDPs, literacy rates, and healthcare indices in India. Yet, when it comes to the nutritional status of adolescent girls, they are statistically indistinguishable from, and sometimes worse than, poorer northern states.

These states have a long history of running the mid-day meal scheme successfully and pioneering in providing adequate food for the children. How do states that feed their children so well still fail to nourish them?

The answer lies not just in biology, but in the sociology of the food plate: caste-based dietary exclusion, the urban slum trap, sanitation challenges, and environmental factors that hinder nutrient absorption.

Hidden hunger and its medical roots

To understand the crisis, we must first define the enemy. According to the World Health Organization (WHO), anaemia is a condition where the number of RBC (Red Blood Corpuscles) cells or the haemoglobin concentration within them is lower than normal, leading to reduced oxygen absorption and transport in a human body. This manifests as fatigue, light-headedness, shortness of breath, sudden black-outs, and an overall cognitive decline – symptoms that impair a girl's ability to focus in class or engage in physical activities.

In south India, anaemia takes the form of "hidden hunger," where girls consume enough calories, mostly from carbohydrates like rice, but lack critical micronutrients such as iron, folate, and vitamin B12. Adolescence exacerbates this, as menstruation and growth spurts increase iron requirements dramatically.

This biological vulnerability is particularly acute in rural south India, where adolescent girls face additional challenges like heavy agricultural labour during growth spurts, increasing energy demands and iron loss. A 2025 study in rural Dharwad, Karnataka, found 47.4% anaemia prevalence among adolescent girls, linked to poor dietary diversity and seasonal food shortages.

Without matching diets, girls slip into anaemia shortly after puberty. Environmental enteropathy, a gut condition caused by chronic exposure to faecal pathogens, further damages nutrient absorption, turning food into a futile intake.

A wealthy region with poor blood profiles

The statistics are jarring. Despite south India’s economic might, the blood profiles of its teenage girls tell a story of chronic........

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