Eating a plant-based diet doesn’t seem to make Greek adults more or less likely to get heart disease, no matter if the plants are healthy or not—because the data is too fuzzy to tell for sure.

People in Greece who eat mostly healthy plant foods like vegetables, fruits, beans, and whole grains tend to have lower heart disease risk—even when you account for things like how old they are, whether they smoke, or how much they weigh.

If Greek adults eat more unhealthy plant-based foods like white bread, soda, sweets, and fried potatoes, they’re 34% more likely to develop heart disease for every small increase in how unhealthy their diet is.

People who eat more plants and less meat and dairy tend to have an 8% lower chance of getting heart disease, at least among U.S. health workers.

People in Greece who eat lots of healthy plant foods like whole grains, fruits, nuts, and vegetables over 10 years are much less likely to get heart disease than those who eat very little of these foods.

Eating more plants instead of animal foods might slightly lower your risk of heart disease, but only if those plants are healthy—like vegetables and whole grains—not junk food like soda or fries.