Long-term Consequences: How Undernutrition in Girls and Women Affects Individual Health and Society

Undernutrition in girls and women is not just a health issue – it is a deeply rooted social and economic crisis that affects entire generations. According to UNICEF, more than one billion adolescent girls and women worldwide suffer from undernutrition, micronutrient deficiencies, or anaemia. The consequences ripple far beyond the individual, weakening families, communities, and nations. Understanding how undernutrition impacts girls and women is essential to designing effective interventions that can break persistent cycles of poverty and poor health.

Why girls and women are more vulnerable to undernutrition 🔗

Nutritional deficiencies affect women far more severely than men, and the reasons are largely structural. Gender inequality, poverty, limited access to education, and harmful social norms all converge to restrict what girls and women eat, when they eat, and how much they eat. In many households across South Asia and sub-Saharan Africa, women eat last and eat least. Women and girls make up roughly 60% of the world’s undernourished population, and an estimated 70% of the 1.3 billion people living in poverty globally are women.

At least 120 million women in developing countries are underweight. In South Asia, the situation is especially severe – approximately 60% of women in the region are underweight. Globally, anaemia affects nearly one in three adolescent girls and women of reproductive age. Pregnant women carry an even higher burden, with anaemia prevalence reaching over 40% worldwide and climbing to 57% in Africa. These deficiencies are not random; they are the predictable outcome of systemic disadvantage rooted in gender, class, and geography.

The critical importance of adolescent nutrition 🔗

Adolescence is a period of rapid growth, hormonal change, and physical development. For girls, this stage sets the biological foundation for reproductive health and adulthood. India alone is home to approximately 243 million adolescents aged 10-19 years, making the nutritional status of this group a matter of national importance.

Yet the data is alarming. Research published in the British Journal of Nutrition found that among Indian adolescents, the prevalence of stunting, anaemia, and thinness was 27.2%, 28.5%, and 24.1% respectively. Another study using India’s National Family Health Survey data found that 41.9% of Indian girls aged 15-19 were underweight according to NFHS-4, with NFHS-5 showing a slight reduction to 39.7% – still an unacceptably high figure.

Adolescents from the poorest households are disproportionately affected. Those with inadequate dietary diversity and poor hygiene practices face a significantly higher risk of stunting and anaemia. Maternal and adolescent education levels are also strong predictors – educated mothers are more likely to make informed food choices and understand the importance of proper nutrition and hygiene.

The intergenerational cycle of undernutrition 🔗

One of the most devastating consequences of undernutrition in girls and women is its tendency to repeat across generations. The mechanism is straightforward: an undernourished girl grows into an undernourished adolescent, who becomes an undernourished mother, who then gives birth to an undernourished baby. This child, if a girl, is likely to face the same fate – and the cycle continues.

Research from the Observer Research Foundation describes how this intergenerational cycle is intensified by poverty, social exclusion, and gender discrimination, producing irreversible effects on cognitive and physical development. The cycle is especially harmful when young mothers begin childbearing before their own growth is complete. When an adolescent girl becomes pregnant, her body must simultaneously support its own growth and that of the developing foetus – a biological competition with serious consequences for both.

A comprehensive study published in The Lancet Child & Adolescent Health analysed data from over 60,000 mother-child pairs in India and found that adolescent pregnancy is associated with child undernutrition through multiple pathways: poorer maternal nutritional status, lower educational attainment, reduced access to health services, suboptimal feeding practices, and poorer living conditions. Together, these factors accounted for an 11 percentage point higher prevalence of child stunting compared to children born to adult mothers.

How early marriage accelerates the problem 🔗

Early marriage and adolescent pregnancy are among the most critical drivers of the intergenerational cycle. In India, the rate of thinness among women married before age 18 is roughly double that of women married after age 24. Children born to adolescent mothers face a 10 percentage point higher prevalence of stunting compared to those born to adult mothers. Early pregnancy also leads to school dropout, which limits the young mother’s future earning potential, knowledge about nutrition, and ability to access healthcare – all factors that directly affect her child’s nutritional outcomes.

Foetal stunting: where undernutrition begins 🔗

A significant portion of childhood undernutrition does not begin after birth – it starts in the womb. “Foetal stunting” refers to restricted growth of the foetus during pregnancy, and it is a major contributor to persistent undernutrition among babies and children. According to UNICEF data, about half of the 51 million stunted children under age two globally became stunted during pregnancy and the first six months of life – a period when the child is entirely dependent on the mother for nutrition.

The primary cause of foetal stunting is poor maternal nutrition before conception and during the first trimester of pregnancy. A study on rural Indian mothers found that maternal undernutrition indicators measured in the first trimester – including low weight, short stature, and low body fat – were strongly associated with low birth weight and stunting at birth. The prevalence of birth stunting was significantly higher among mothers in the lowest weight category compared to those in the highest.

Research supported by the U.S. National Institutes of Health further confirms that women who received nutritional supplementation starting before pregnancy or in the first trimester were 31% less likely to have a stunted child at birth and 22% less likely to have a small-for-gestational-age infant. This evidence underscores that the window for preventing foetal stunting opens well before pregnancy begins.

Consequences beyond individual health 🔗

The impact of undernutrition in girls and women extends well beyond individual health outcomes. It carries enormous social and economic costs. A report by World Vision estimates that malnutrition costs the global economy over $1.6 trillion annually in lost productivity and potential. More than 3 million baby girls are unlikely to reach their fifth birthday due to vitamin A deficiency and low birth weight alone, and nearly 16 million of those who survive to adolescence are unlikely to complete secondary education.

Impact on cognitive development and education 🔗

Undernutrition during early life and in utero impairs brain development. The consequences include reduced learning capacity, poor school performance, and lower lifetime earnings. In India, maternal undernutrition is estimated to account for roughly one-fifth of all childhood stunting, which in turn contributes to 68% of under-five child deaths. Children who survive but remain stunted carry the effects into adulthood – they are more susceptible to chronic diseases such as diabetes, hypertension, and obesity.

Economic burden on communities and nations 🔗

When women are malnourished, they are more prone to infections, have lower productivity, and face greater risks during childbirth. This reduces their capacity to earn, care for their families, and contribute to their communities. Approximately 20 million babies are born with low birth weight each year, closely linked to poor maternal nutrition before and during pregnancy. Each of these births carries the potential for higher healthcare costs, lower educational attainment, and reduced economic output over a lifetime.

Breaking the cycle: why adolescent girls hold the key 🔗

Addressing malnutrition among adolescent girls – particularly early adolescents aged 10-14 – is widely recognised as the most effective strategy to break the intergenerational cycle of undernutrition. Adolescence represents a unique window of opportunity because it is the last significant growth phase before adulthood. Interventions during this period can reverse stunting and improve nutritional status before a girl enters her reproductive years.

What works: evidence-based interventions 🔗

Several strategies have demonstrated effectiveness in breaking the cycle:

Iron and folic acid supplementation: India’s Weekly Iron and Folic Acid Supplementation (WIFS) programme targets adolescent anaemia. Evidence shows it is effective in reducing anaemia prevalence and helps break the intergenerational chain of malnutrition. However, coverage remains insufficient – fewer than one-third of pregnant women in India consume iron and folic acid tablets for the recommended 100 days.

Delaying marriage and childbearing: Policies that keep girls in school and delay marriage directly improve nutritional outcomes for the next generation. Women who complete 10 years of education are more likely to marry later, access healthcare during pregnancy, and make better nutritional choices for themselves and their children.

Preconception nutrition: Research from the WINGS study in Delhi found that integrated preconception and pregnancy interventions led to a 24% reduction in low birth weights and a 51% reduction in stunting at 24 months of age. Yet preconception nutrition programmes remain a major unmet need in India and South Asia.

Improving dietary diversity: Access to diverse, nutrient-rich foods is critical. Adolescents with inadequate dietary diversity face significantly higher odds of stunting. Community-based programmes that combine nutrition education with access to diverse food sources – such as homestead food production, school feeding, and food fortification – can address this gap.

Strengthening health services: Increasing coverage of antenatal care, ensuring quality nutrition counselling, and integrating maternal nutrition monitoring into existing health platforms are all essential. In India, states like Maharashtra and Odisha have demonstrated that focused investment in maternal and adolescent nutrition, combined with improved healthcare delivery, can significantly reduce childhood stunting.

The path forward 🔗

The evidence is clear: undernutrition in girls and women is both a cause and a consequence of broader social inequality. It cannot be solved by food alone. A comprehensive approach is needed – one that addresses poverty, education, gender discrimination, early marriage, and access to healthcare simultaneously. As the World Health Organization states, optimising nutrition early in life, including the 1,000 days from conception to a child’s second birthday, ensures the best possible start with long-term benefits.

But the window of opportunity opens even earlier – during adolescence and the preconception period. Investing in the nutrition of adolescent girls is not just a health intervention; it is an investment in economic productivity, educational attainment, gender equality, and sustainable development. Every undernourished girl who receives proper nutrition today has the potential to break a cycle that may have persisted in her family for generations.

What do you think? Given that undernutrition is so deeply tied to social factors like poverty and gender inequality, can nutrition-specific interventions alone make a meaningful difference – or do we need to fundamentally rethink how societies value and invest in girls and women?

References

1. https://www.unicef.org/reports/undernourished-overlooked-nutrition-crisis
2. https://www.worldhunger.org/women-and-hunger-facts/
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC10052428/
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC11668372/
5. https://www.orfonline.org/research/malnutrition-india-needs-to-urgently-break-inter-generational-cycle
6. https://www.thelancet.com/journals/lanchi/article/PIIS2352-4642(19)30110-5/fulltext
7. https://www.unicef.org/press-releases/malnutrition-mothers-soars-25-cent-crisis-hit-countries-putting-women-and-newborn
8. https://bmcnutr.biomedcentral.com/articles/10.1186/s40795-021-00478-4
9. https://www.nih.gov/news-events/nih-research-matters/nutrition-supplement-increases-infant-birth-size
10. https://reliefweb.int/report/world/breaking-cycle-malnutritions-toll-women-and-girls
11. https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2024.1405247/full
12. https://www.who.int/news-room/fact-sheets/detail/malnutrition