Fish for more omega-3s. When it comes to fats, we are what we eat: our cell membranes reflect the fat content of our diet. When we eat ample omega-3s, our membranes—including those of our heart and blood vessels—are more elastic (that's how omega-3-rich fatty fish stay flexible in icy waters). Blood moves through the body more easily, reducing the risk of high blood pressure and blood clots. All this can help prevent hardened arteries and stroke, and lowers risk of an irregular heart rate.