The protective effect had not merely faded—it had reversed.
There is an old observation in medicine called the 'healthy immigrant effect' — newcomers arrive with stronger hearts than those born into the country they enter. A study presented at a cardiology conference in Dubai now traces how that advantage quietly dissolves over fifteen years of American life, as traditional diets give way to processed food, community bonds loosen, and the chronic stress of displacement accumulates in the body. The finding asks something larger than a clinical question: what does a society do to the health of those who come to join it?
- Immigrants arrive in the US with measurably healthier hearts — nearly 6% fewer cardiovascular risk factors than native-born Americans — but that biological head start is on a slow countdown.
- After fifteen years, the advantage not only disappears but reverses: long-term immigrants show higher rates of diabetes and high cholesterol than US-born peers, with foreign-born Asian adults carrying nearly two and a half times the diabetes burden of US-born Asian adults.
- The culprits are layered — processed food, sedentary routines, and the erosion of protective cultural practices compound with discrimination, financial precarity, and language barriers that block access to preventive care.
- Researchers are pushing for a recalibration of clinical practice: how long a patient has lived in America should now be treated as a meaningful cardiovascular risk variable, not background noise.
- The deeper alarm is systemic — the study frames the US food environment, its pace, and its structural stressors as active agents of harm, raising the question of whether public health can intervene before damage becomes irreversible.
When immigrants first arrive in the United States, their hearts are measurably healthier than those of people born here. A study presented this week at a cardiology conference in Dubai traced what happens next — and the trajectory is not encouraging.
Researchers analyzed data from nearly 16,000 adults surveyed between 2011 and 2016, dividing participants into US-born adults, immigrants resident for fewer than fifteen years, and those who had been here longer. Among US-born adults, 86.4 percent carried at least one cardiovascular risk factor. Among newer immigrants, that figure fell to 80.1 percent — a modest but consistent edge across measures of hypertension, cholesterol, and smoking.
For long-term immigrants, the picture inverted. Those past the fifteen-year mark showed higher rates of diabetes and high cholesterol than native-born Americans. The protective effect had not simply faded — it had reversed. The disparity was sharpest among ethnic subgroups: foreign-born Asian adults had nearly two and a half times the diabetes rate of US-born Asian adults.
Krishna Moparthi, a medical student and co-author of the study, identified the mechanism: immigrants gradually absorb American dietary and lifestyle habits — more processed food, more sedentary time, less of the traditional practices that once shielded them. But acculturation is only part of the story. Discrimination, financial instability, and the chronic stress of navigating an unfamiliar system wear on the body too. Language barriers and institutional distrust delay screening, allowing risk factors to accumulate silently.
The clinical implication is direct: how long a patient has lived in America should factor into cardiovascular risk assessment. The researchers call for early screening, culturally informed counseling, and prevention strategies tailored to the specific pressures immigrants face — an effort to help them hold onto the health advantage they arrived with, before the American environment quietly takes it away.
When immigrants first arrive in the United States, their hearts are healthier than those of people born here. But that advantage doesn't last. The longer they stay, the more their cardiovascular risk climbs—until, after fifteen years or so, many have caught up to or surpassed the disease burden of native-born Americans. A study presented this week at a cardiology conference in Dubai found that what begins as a protective edge erodes steadily under the weight of American life.
Researchers examined data from nearly 16,000 adults surveyed between 2011 and 2016, comparing cardiovascular risk factors across three groups: people born in the U.S., immigrants who had lived here less than fifteen years, and immigrants who had been here longer. The numbers told a clear story. Among U.S.-born adults, 86.4 percent had at least one cardiovascular risk factor—high blood pressure, high cholesterol, diabetes, obesity, or smoking. Among newly arrived immigrants, that figure dropped to 80.1 percent. The difference was small but consistent across multiple measures. Immigrants in their first fifteen years showed lower rates of hypertension, high cholesterol, and smoking than their American-born peers.
But the picture inverted for immigrants who had spent more than fifteen years in the country. Those who had been here longest showed higher rates of diabetes and high cholesterol than U.S.-born adults. The protective effect had not merely faded—it had reversed. The researchers also found striking disparities within ethnic groups. Foreign-born Asian adults living in America had nearly two and a half times the diabetes rate of U.S.-born Asian adults, though they smoked less.
Krishna Moparthi, a medical student at John F. Kennedy University School of Medicine and one of the study's authors, described the mechanism plainly: immigrants gradually absorb American dietary and lifestyle habits, and those habits damage their hearts. Over time, they eat more processed food, more sugar, more fat. They move less. They sit more. The protective cultural practices that initially shielded them—traditional diets, regular physical activity, tight community networks—fade as they integrate into American life.
But acculturation alone doesn't explain the decline. Stress plays a role too. Discrimination, financial instability, precarious work conditions, and the chronic anxiety of navigating an unfamiliar system wear on the body. Access to preventive care matters as well. Language barriers, cost, and distrust of institutions can delay screening and treatment, allowing risk factors to accumulate silently until disease takes hold.
The implication for doctors is straightforward: how long an immigrant has lived in America should factor into how clinicians assess their heart risk. A patient who arrived five years ago and a patient who arrived twenty years ago are not the same person, cardiovascularly speaking. Moparthi and his colleagues argue for early screening, culturally informed counseling, and prevention strategies tailored to the specific pressures immigrants face. The goal is to help them hold onto the health advantage they brought with them, rather than watch it dissolve into the American pattern of disease.
The study suggests that the U.S. environment itself—its food systems, its pace, its stressors, its barriers to care—is actively harmful to immigrant health over time. The question now is whether public health can intervene before that harm becomes irreversible.
Notable Quotes
As immigrants are exposed to U.S. dietary and lifestyle habits for prolonged periods of time, it has a negative effect on their heart health.— Krishna Moparthi, medical student and study co-author
Immigrants arrive with a cardiovascular health advantage, but this fades the longer they reside in the U.S. due to acculturation, stress and lifestyle changes.— Krishna Moparthi
The Hearth Conversation Another angle on the story
Why does the advantage fade so quickly? Is it just that immigrants start eating worse food?
It's more than that. Yes, diet matters—processed foods, sugar, sedentary habits. But there's also the stress of living here. Discrimination, financial precarity, unstable work. The body keeps score of that.
So it's not just individual choice. It's the system they're living in.
Exactly. They arrive with protective practices—their traditional diets, their activity patterns, their social networks. Those things kept them healthy. But American life erodes all of that, and not always because they choose it.
What about the Asian immigrants with the high diabetes rates? That's a specific finding.
That's worth watching. It suggests that certain populations may be more vulnerable to these changes, or that they face particular barriers. The study doesn't fully explain why, but it's a signal that one-size-fits-all prevention won't work.
What would actually help?
Clinicians need to know how long someone has been here and screen accordingly. But also—and this is the harder part—we'd need to address the actual conditions that drive the decline. The food environment, the work conditions, the discrimination. Prevention strategies that ignore those are just telling people to swim against the current.
So the real intervention is structural, not just medical.
Yes. The medicine is necessary but not sufficient. You can counsel someone all you want, but if they're working two jobs and living in a food desert, the odds are against them.