The type of fat considered heart-healthy and beneficial when consumed in moderation is unsaturated fat, particularly monounsaturated and polyunsaturated fats. These fats can help improve cholesterol levels and reduce the risk of heart disease. Sources of unsaturated fats include olive oil, avocados, nuts, seeds, and fatty fish, which provide essential fatty acids like omega-3s. Consuming these fats as part of a balanced diet contributes to overall cardiovascular health and supports various bodily functions. Moderation is key, as excessive fat intake, regardless of type, can lead to weight gain.