That cartoon image of Popeye gulping down a can of spinach and immediately gaining the strength to defend Olive Oyl’s honor and win her heart is a classic. And appeals not just to my juvenile sense of humor but my concern for cardiac well-being. It has long been known, and widely touted, that a Mediterranean diet rich in fruits, vegetables, seafood, a glass of red wine and glugs of olive oil are good for your ticker. And leafy green veggies, like spinach, are known to have all sorts of health benefits. Well here’s another one you may not have heard of.