Food insecurity comes first—that makes it a clear target for prevention.
Food insecurity in early adulthood increases cardiovascular disease risk by 41%, affecting 11% of food-insecure vs 6% of food-secure individuals over two decades. The study resolves a long-standing question by proving food insecurity precedes heart disease, making it a clear prevention target for healthcare systems.
- 41% higher cardiovascular disease risk for food-insecure young adults
- 11% of food-insecure vs. 6% of food-secure participants developed heart disease over 20 years
- 3,616 adults followed from 2000-2001 through two decades
- Food insecurity affects 1 in 8 U.S. households annually
- Study published in JAMA Cardiology, March 2025
A 20-year Northwestern Medicine study finds young adults with food insecurity face 41% higher risk of developing heart disease by midlife, establishing food insecurity as a preventable risk factor rather than a consequence.
The question had lingered in medicine for years: Does hunger lead to heart disease, or does heart disease create the conditions for hunger? A new study from Northwestern Medicine offers a definitive answer, and it reframes how doctors should think about prevention.
Researchers followed 3,616 adults over two decades, beginning in 2000 and 2001 when participants were in their early thirties to mid-forties. Those who reported struggling to afford enough nutritious food at that baseline point were 41% more likely to develop cardiovascular disease in the years that followed. By the end of the study period, 11% of the food-insecure group had developed heart disease, compared to 6% of those with reliable access to food. The findings, published in JAMA Cardiology, suggest that food insecurity is not merely a symptom of poverty that happens to coincide with heart problems—it is a causal risk factor in its own right.
The study drew from the Coronary Artery Risk Development in Young Adults (CARDIA) project, a long-running cohort that has tracked Black and white Americans since the mid-1980s. By following the same people across two decades, the researchers could establish a clear timeline: food insecurity came first, and cardiovascular disease followed. "For a long time, there was this chicken-or-the-egg question," said Dr. Jenny Jia, an instructor of general internal medicine and preventive medicine at Northwestern University Feinberg School of Medicine. "By following people over two decades, we were able to show that food insecurity, on its own, significantly increases the risk of developing cardiovascular disease."
The stakes are substantial. Food insecurity affects one in eight households across the United States each year. At baseline, participants experiencing food insecurity were more likely to identify as Black and had lower educational attainment than their food-secure peers, underscoring how the burden falls unevenly across the population.
What makes this finding actionable is that it points toward prevention. If food insecurity drives heart disease rather than the reverse, then addressing hunger early could prevent disease later. Jia emphasizes that primary care settings—where internists, pediatricians, and family doctors see patients regularly and often enjoy their trust—are ideal places to screen for food insecurity. But the screening could extend further: emergency rooms, cardiology clinics, and other specialties could all incorporate questions about food access. Nurses, medical assistants, or patients themselves filling out intake forms could identify the problem.
The harder part comes next. Once a patient screens positive for food insecurity, what then? Jia raises the central question: Should healthcare systems connect patients to social workers who can link them with existing community programs? Should hospitals develop their own interventions? Should insurance companies cover food as medicine? These questions remain open, and they will shape whether this research translates into actual change in how medicine is practiced.
The research team plans to continue following this cohort as they age. "It's surprising to see heart disease in this group, which doesn't include those 65 or older," Jia noted. As the participants approach eighty, researchers will revisit the data to understand how food insecurity's effects compound over a lifetime. The implication is clear: the damage done by hunger in one's thirties and forties echoes forward, and the window to intervene is now.
Citações Notáveis
By following people over two decades, we were able to show that food insecurity, on its own, significantly increases the risk of developing cardiovascular disease.— Dr. Jenny Jia, Northwestern Medicine
The more we screen for it, the better. We need better strategies to help people once they screen positive.— Dr. Jenny Jia
A Conversa do Hearth Outra perspectiva sobre a história
Why does food insecurity specifically cause heart disease? Is it just malnutrition, or is something else happening?
The study doesn't isolate the exact mechanism, but we can think about it several ways. Chronic stress from not knowing where your next meal comes from activates the nervous system in ways that damage blood vessels. People experiencing food insecurity often eat cheaper, more processed foods when they can afford them. There's also the inflammation that comes with poverty itself—the constant worry, the social isolation. It's not one thing; it's the whole weight of it.
The study controlled for socioeconomic factors. So it's not just that poor people have more heart disease for other reasons?
Right. They accounted for income, education, and other demographic variables. What they found is that food insecurity adds risk on top of those factors. It's a distinct problem, not just a proxy for being poor.
Why did it take twenty years to see the effect?
Heart disease develops slowly. You don't go from skipping meals to a heart attack in a year. The damage accumulates—the inflammation, the stress hormones, the dietary deficiencies. Twenty years is actually the right window to see the full picture.
The study mentions that Black adults were overrepresented among the food-insecure group. Is that part of the story?
It's part of the context. Food insecurity doesn't affect all communities equally. Structural inequities mean Black Americans face higher rates of food insecurity, and this study shows they're also bearing the cardiovascular consequences. That's important for understanding where prevention efforts need to focus.
If a doctor screens someone for food insecurity today, what can they actually do?
That's the honest gap in the system right now. Screening is the first step, but the infrastructure to help people is patchy. Some areas have robust food banks and community programs. Others don't. Doctors can refer patients to social workers, but what happens after that depends on where you live and what resources exist. That's why Jia is asking whether healthcare systems need to build their own interventions.
So this study is really a call to action?
Exactly. It's saying: we now have proof that addressing food insecurity early prevents heart disease later. The question is whether the healthcare system will act on that knowledge.