21. Extra Virgin Olive Oil
Extra virgin olive oil is a cornerstone of the Mediterranean diet, celebrated for its abundance of monounsaturated fats that protect heart health. Instead of butter or margarine, cardiologists often drizzle olive oil on vegetables, salads, or whole grains. The Harvard T.H. Chan School of Public Health notes that using olive oil can help reduce inflammation and cholesterol. It’s an easy, flavorful swap for healthier cooking and meal prep.