Nutrient sources refer to the various foods and substances that provide essential nutrients needed for the body to function properly. These nutrients include carbohydrates, proteins, fats, vitamins, and minerals. Common sources of these nutrients are fruits, vegetables, grains, dairy products, and meats. Each food group contributes different nutrients, making a balanced diet important for overall health. Plant-based foods, such as legumes, nuts, and whole grains, are excellent sources of fiber and essential vitamins. Animal products, like fish, poultry, and dairy, provide high-quality proteins and important minerals like calcium and iron. Understanding nutrient sources helps individuals make informed dietary choices for better health.