A new global study published in Lancet Global Health found that even slight declines in national income can significantly increase childhood malnutrition, including undernutrition, overweight, and obesity. This finding is particularly important for South Asia, which has some of the highest rates of child malnutrition in the world. 

The Barcelona Institute for Global Health (ISGlobal) led the study, which examined data from over 1.6 million children in 68 low- and middle-income countries (LMICs), many of whom lived in South Asia. The study investigated how economic downturns, or unexpected drops in national income, affect nutrition in the critical early years of life. 

"Income shocks can significantly increase the risk of various forms of childhood malnutrition and help identify critical windows for action," said Davide Rasella, the study's coordinator. 

To further understand the relationship between economic instability and child nutrition, the researchers integrated 230 national household surveys with economic data from the World Inequality Database. They concentrated on the "first 1,000 days" of life — from pregnancy to a child's second birthday — a well-known time when diet is most crucial for long-term health. 

While Economic downturns have a significant impact on child nutrition in every country,  South Asia, particularly in the early years of life. Income declines during pregnancy and infancy significantly raise the risk of stunting, which occurs when infants grow too short for their age, with the effect exacerbated during severe economic crises. When these income shocks occur near birth, they increase the likelihood of both wasting (dangerous thinness) and stunting in the same kid, demonstrating how economic instability during pregnancy can cause long-term injury. Alarmingly, children who experience economic shocks within the first 1,000 days of life are 30% more likely to be stunted and overweight later in life, revealing a growing double burden of malnutrition. The study also demonstrates that these effects differ by income level: poorer families face bigger increases in undernutrition during economic shocks, whereas wealthy households observe increased childhood obesity, highlighting profound social inequities in health outcomes. 

South Asia already faces a major double burden of malnutrition, with undernutrition and growing childhood obesity. According to UNICEF's 2023 regional forecasts, South Asia has over 55 million stunted children under the age of five, and overweight and obese rates are rising as a result of inadequate nutrition and urbanisation. 

This combined burden causes complex health issues. Undernutrition in early life raises the risk of infections, delayed development, and even death. Overweight and obesity increase the chance of developing diabetes and heart disease later in life. 

Natanael Silva, the study's first author, stated, "Our analysis is the first to account for economic differences within countries and look at critical time windows and different forms of malnutrition, including overweight and obesity." 

South Asia is especially sensitive to economic shocks because of its vast informal workforce, frequent natural disasters, and global crises like COVID-19 and food price inflation. According to the World Bank, millions of individuals in South Asia lived barely above the poverty line prior to the pandemic, rendering them particularly vulnerable to income shocks. 

Experts argue that economic policies should be designed with child nutrition in mind. "Given the multiple crises the world is currently facing, we need to better understand how economic shocks and poverty influence malnutrition in children to better design interventions and prevention strategies," said Rasella. 

The authors encourage policymakers to create tailored assistance for pregnant women and young children during economic downturns. Cash transfers, food subsidies, and increased healthcare access are examples of measures that can protect nutrition throughout the most critical phase of life.