At 45, South Asian men in a new national study were nearly eight times more likely to have prediabetes than their white peers — 31% versus 4%. They also ate better, drank less, and exercised about as much. That gap alone should stop anyone reading it mid-scroll, because it flips the usual health-story logic on its head: this isn’t a story about bad habits catching up with people. It’s a story about good habits not being enough.
The study, published in the Journal of the American Heart Association in February 2026, comes out of Northwestern University’s Feinberg School of Medicine, led by Dr. Namratha Kandula. Her team pulled together data from 2,700 adults ages 45 to 55, drawing on two long-running cohorts: MASALA, which tracks South Asian American health specifically, and MESA, which covers white, Black, Hispanic, and Chinese adults. That pairing is what makes the comparison possible in the first place — you can’t see a pattern this specific without a dataset built to isolate it.
And the pattern holds across nearly every marker. By 45, South Asian men had hypertension rates of 25%, compared to 18% among white men, 10% among Hispanic men, and 6% among Chinese men. Nearly 78% had high cholesterol or triglycerides, versus 61% of Black men in the same age band. South Asian women weren’t spared either — their prediabetes rate ran close to double that of every other group studied. By 55, South Asian adults overall were twice as likely as white adults to have developed type 2 diabetes. None of this tracks with the lifestyle side of the same dataset, where South Asian participants reported higher diet quality, lower alcohol consumption, and activity levels on par with everyone else.
“The mismatch between healthier lifestyle behaviors and clinical risk was surprising,” Kandula said of the findings — which, for a researcher who studies this population for a living, is a notable thing to admit. The honest answer to why is that standard health screening was never built with South Asian bodies as the reference point.
That’s where the “thin-fat” phenotype comes in, a pattern cardiometabolic researchers have been documenting in South Asian populations for years, independent of this new study. People can carry a completely normal BMI and still be storing a disproportionate amount of visceral fat — the kind wrapped around the liver, pancreas, and other organs rather than sitting under the skin where a doctor or a mirror would catch it. Research out of the same MASALA and MESA cohorts has previously shown that South Asians accumulate this metabolically active fat at lower body weights than white, Black, or Hispanic adults, and that CT-measured fat around the organs predicts diabetes risk far more reliably than BMI does. A number on a standard scale, or a BMI calculation done in a doctor’s office, can miss the entire problem.
That’s a genuinely uncomfortable thing to sit with if you grew up hearing that eating right and staying active is the whole equation, or watched a parent do exactly that and still end up on blood pressure medication in their fifties. It’s also, in a strange way, less about individual failure than almost any other chronic-disease story out there — which is precisely why Kandula’s team is pushing for earlier screening rather than another round of diet advice. Her recommendation isn’t a new eating plan; it’s getting blood pressure, glucose, and cholesterol checked well before the age most guidelines currently suggest, since standard risk calculators built on other populations tend to flag South Asian patients too late to matter.
For a diaspora that’s spent decades being told its cuisine and its physiology are the problem, a study built specifically to separate those two things is worth sitting with. The dal and the daily walk were never the issue. Kandula’s team does still point to small, specific dietary tweaks worth making — more whole grains, cooking oils lower in saturated fat, less deep-frying — but she’s careful to frame those as refinements on an already-healthy pattern, not a fix for a broken one. The real fix she’s asking for sits with clinicians: screening protocols built around South Asian risk curves instead of ones borrowed wholesale from research done on white populations decades ago.
What’s overdue is a healthcare system that measures South Asian bodies on their own terms instead of running them through a scale calibrated for someone else’s risk curve — and a community that starts asking for that screening at 40 instead of waiting for a doctor to bring it up first.
Sources
- Northwestern Now — Feb 2026
- American Heart Association Newsroom — Feb 2026
- Journal of the American Heart Association — original study
- Body Composition and Diabetes Risk in South Asians: Findings From the MASALA and MESA Studies — PMC
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- SEO title: South Asians Hit Heart-Disease Risk at 45 Despite Healthy Habits
- Meta description: A 2026 JAHA study finds South Asian men face 8x the prediabetes risk of white men by 45 — despite better diets. Here’s what standard screening misses.
- Focus keyword: South Asian heart disease risk age 45
- Secondary keywords: South Asian prediabetes study, thin-fat phenotype diabetes risk
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- Category: Culture & Diaspora
- Tags: South Asian diaspora, heart health, diabetes risk, MASALA study, health disparities, desi wellness
