it’s been a rough week for some of the foods we’ve come to think of as healthy. One recent study called into question the health benefits of chocolate and red wine, while another took issue with the original research on fatty fish and heart disease. The jury is still out on how much attention we should pay these new warnings, but happily, new research in Proceedings of the National Academy of Sciences looks at the effect of the Mediterranean diet on heart health – and the verdict is favorable. But even more than that, the study lays out exactly why olive oil and greens are together so beneficial for the heart. Though the study was done in mice, the results very likely apply to humans, too.