Healthy fats play several important roles in the diet, including providing essential fatty acids and aiding in nutrient absorption. Foods rich in healthy fats, such as avocados, nuts, seeds, and olive oil, can help lower bad cholesterol (LDL) levels while increasing good cholesterol (HDL). They also provide a concentrated source of energy and help in the absorption of fat-soluble vitamins like A, D, E, and K. Including healthy fats in moderation not only contributes to heart health but also supports overall well-being and brain function.