The dietary component that primarily contributes to heart health when consumed in moderation is unsaturated fats, particularly omega-3 fatty acids. Found in fatty fish, nuts, and seeds, these fats help lower cholesterol levels and reduce inflammation. Additionally, incorporating foods rich in potassium, such as fruits and vegetables, supports blood pressure regulation. A balanced intake of these nutrients, alongside limited saturated and trans fats, reinforces cardiovascular health and decreases the risk of heart disease.