A study suggests that the quality of food is more important than the amount of carbs or fat for preventing heart disease. The research, which involved a large number of participants, found that diets rich in high-quality, plant-based foods and low in animal products may lower the risk of heart disease, regardless of whether they are low in carbs or fat. The findings indicate that the type of food, rather than just the macronutrient content, plays a key role in heart health.