Diet diversity is a research area focused on studying the variety and nutritional quality of foods consumed by individuals or populations. It explores how diverse and balanced diets can contribute to better health outcomes, including reducing the risk of chronic diseases such as obesity, diabetes, and cardiovascular diseases. Researchers in this field often examine the impact of different dietary patterns, food groups, and nutrient intake on overall health and well-being. Diet diversity research also considers factors such as cultural preferences, accessibility to fresh and healthy foods, and the role of food processing and food environments in shaping dietary choices. Overall, the goal of diet diversity research is to promote optimal nutrition and improve public health through diverse and balanced dietary patterns.