“Power protein” sources with a variety of complex heart-protective phytonutrients include tuna, salmon, nuts (and nut butters) and seeds. Omega-3 fatty acids found in fatty fish and seeds can help lower triglycerides, limit blood clots and arrhythmias and reduce the risk of heart attack. When it comes to fish, she says the best choices are wild or fresh salmon and wild, fresh or light-canned tuna as well as herring and mackerel. The recommendation is to eat at least two 3- to 6-ounce servings of fish per week. While nuts and seeds are naturally high in fat and calories, they still provide a good source of heart-healthy unsaturated fat and protein. Choose dry roasted, unsalted nuts or seeds such as almonds, walnuts, peanuts, and sunflower, chia or pumpkin seeds.