News Release

Food insecurity and water insecurity go hand in hand, study finds

Study suggests water may be key to addressing hunger in low and middle-income countries

Peer-Reviewed Publication

American Society for Nutrition

Relationship of water insecurity and food insecurity

image: Across regions, a large proportion of people facing water insecurity also reported food insecurity. The overall prevalence of water insecurity ranged from just below 15% in Asia to over 34% in sub-Saharan Africa. view more 

Credit: Hilary Bethancourt and Sera Young, Northwestern University; Edward A. Frongillo, University of South Carolina; and Sara Viviani and Carlo Cafiero, Food and Agriculture Organization of the United Nations

Rockville, Maryland (June 14, 2022) — About one-tenth of the world’s population suffers from hunger and nearly one in three people face food insecurity, according to recent estimates. Yet behind those stark figures lurks another, closely related threat: water insecurity.

In a new 25-country study, researchers report a strong link between water insecurity—a lack of reliable access to sufficient water—and food insecurity. The findings, based on data collected for the first time in 2020 by Northwestern University and the Food and Agriculture Organization of the United Nations (FAO) via the Gallup World Poll, suggest that improving access to water could be key to sustainably and effectively addressing food insecurity in many places.

The study found that people who frequently had trouble with water access and use were nearly three times as likely to face food insecurity compared with those who did not. Further, more than two-thirds of people who were water insecure in 2020 were concurrently experiencing food insecurity. Reliable access to water is important not only to maintain proper hydration but also to support cooking, hygiene and farming. 

“Water insecurity is a major global health issue and its impact on biological and social well-being is only likely to grow with climate change,” said Hilary Bethancourt, PhD, MPH, research associate at Northwestern University, a member of the research team. “These data suggest that we have seen just the tip of the iceberg of understanding the role that water insecurity plays in food, nutrition and well-being in general.”

Bethancourt will present the findings online at NUTRITION 2022 LIVE ONLINE, the flagship annual meeting of the American Society for Nutrition held June 14-16. Bethancourt conducted the study with Sera Young, PhD, at Northwestern University, Edward A. Frongillo, PhD, at the University of South Carolina, and Sara Viviani and Carlo Cafiero at FAO.

The researchers analyzed data from a nationally representative sample of over 31,000 people ages 15 and older in 25 low and middle-income countries across Africa, Latin America and Asia. Overall, about 18% of participants were classified as water insecure; this ranged from about 15% in Asia to over 34% in sub-Saharan Africa. Water insecurity was strongly linked with food insecurity overall, though researchers said the relationship varied across regions, likely due to differences in climate, water infrastructure, social services and other factors.

While the study did not assess the causes of food or water insecurity, researchers said several factors could explain the linkage. For those living in poverty, spending money on water can mean less money available for food. For farmers, water insecurity can mean less water available for growing crops and raising livestock. Time is also an issue: traveling far from home to collect water detracts from the time available to generate income or prepare food. Water insecurity could also affect nutritional quality — a subcategory of food insecurity — since lacking the water to cook healthier foods like grains and beans may lead to a greater reliance on ready-to-eat processed foods.

Based on these findings, researchers suggested food insecurity and water insecurity should be measured and addressed in tandem. This would ensure that insufficient water does not pose an additional barrier to food security and in particular to food utilization, for example, by preventing people from using food provided by food assistance programs because there is no water to prepare it. As such, efforts to improve access to water could also bring benefits for food security. 

“In some cases, the most sustainable way to improve food security may be through improving water security,” said Bethancourt. “For example, providing households with water on premises may free up time to engage in income-generating activities so that they can purchase more or higher quality food. Providing irrigation can improve farmers’ ability to grow food, raise livestock and produce cash crops.”

Researchers noted that the study methods did not allow them to pinpoint a causal relationship between food insecurity and water insecurity or rule out all other factors that may influence both. Bethancourt said further research is needed to understand the factors that influence the degree to which water insecurity co-exists with or exacerbates food insecurity.

Bethancourt will present this research on-demand starting at noon on Tuesday, June 14, during NUTRITION 2022 LIVE ONLINE (abstract; presentation details).

Image available.

Please note that abstracts presented at NUTRITION 2022 LIVE ONLINE were evaluated and selected by a committee of experts but have not generally undergone the same peer review process required for publication in a scientific journal. As such, the findings presented should be considered preliminary until a peer-reviewed publication is available.


NUTRITION 2022 LIVE ONLINE is part of a new year-around experience featuring ASN’s flagship annual meeting held virtually June 14-16, 2022, plus learning and networking opportunities that will be offered throughout the year. The online annual meeting is a dynamic virtual event showcasing new research findings and timely discussions on food and nutrition. Scientific symposia explore hot topics including clinical and translational nutrition, food science and systems, global and public health, population science and cellular and physiological nutrition and metabolism. #NutritionLiveOnline

About the American Society for Nutrition (ASN)

ASN is the preeminent professional organization for nutrition research scientists and clinicians around the world. Founded in 1928, the society brings together the top nutrition researchers, medical practitioners, policy makers and industry leaders to advance our knowledge and application of nutrition. ASN publishes four peer-reviewed journals and provides education and professional development opportunities to advance nutrition research, practice and education.

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