Cardioprotective describes foods, nutrients, or dietary patterns that help protect the heart and blood vessels from disease. The Mediterranean diet is the best-studied example, with olive oil, nuts, oily fish, whole grains, and abundant vegetables linked to lower rates of heart attack and stroke. Individual cardioprotective components include omega-3 fatty acids, soluble fibre, potassium, and plant sterols, which act on cholesterol, blood pressure, and inflammation. The term appears in nutrition research and qualified health claims, where regulators require solid evidence before a food may advertise heart benefits. No single food protects the heart alone; the overall dietary pattern is what counts.