Adults whose meals looked most like a plant-based Mediterranean pattern were 26% less likely to develop cardiovascular disease over two decades, according to results from the ATTICA study published in the European Journal of Nutrition in June 2026.
The finding comes from a prospective cohort of 3,042 healthy Greek adults enrolled in 2001 and 2002, with complete cardiovascular data available for 1,988 people at the 20-year follow-up. During those two decades, 36% of participants had a cardiovascular event.
What the protective pattern looked like
The Athens researchers grouped the volunteers by how their eating habits clustered. One pattern stood out for lower heart risk. It leaned on vegetables, fruits, legumes and nuts, grains, fish and seafood, with dairy included as well.
Two other patterns pointed the other way. A Western pattern rich in red meat, potatoes, sweets and eggs was linked to worse outcomes, and so was a high-calorie pattern low in white meat.
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The 26% lower risk reflects each one-standard-deviation increase in adherence to the plant-based pattern, after adjusting for age, income, existing health conditions and lifestyle. People whose diets sat highest on that scale had a 61% lower adjusted hazard of a cardiovascular event compared with people whose diets sat lowest.
As an observational study, the analysis cannot prove that the diet caused the difference. It shows a strong link across a very long window.
Why it matters in the US
Heart disease is still the leading cause of death in the United States, the American Heart Association reported in its 2026 statistics update. Heart disease accounted for 22% of all US deaths in 2023, and cardiovascular disease overall claimed 915,973 lives that year.
The Mediterranean pattern lines up closely with what the American Heart Association recommends for heart health. That means plenty of vegetables, fruits, whole grains, beans and legumes, along with fish, poultry, non-tropical vegetable oils and nuts.
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The AHA also flags what to keep low. Added sugars, sugary drinks, sodium, refined carbs, saturated fats and processed meats sit at the top of the list.
Most American adults do not eat that way. NHANES surveys have consistently found that the average US adult scores well below the levels used to define high Mediterranean adherence, with intakes skewed toward refined grains, added sugars and processed meats.
Small swaps that move the needle
You do not need a full pantry overhaul to shift toward the pattern the ATTICA researchers studied. A few practical changes get you most of the way there.
Use extra virgin olive oil in place of butter or margarine when you cook or dress vegetables. Swap red meat for fish, chicken, beans or lentils in two or three dinners each week. Choose whole grain bread, pasta or brown rice instead of white versions.
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Reach for fruit, nuts or plain yogurt when you want a snack, rather than pastries or chips. Fill half the plate with vegetables at lunch and dinner, whether raw, roasted or stewed.
Heart disease has many drivers, and no single meal changes an individual's odds overnight. But the direction of the evidence is consistent, and anyone with existing heart concerns or medications should talk to their doctor before making major changes to what they eat.
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