Knowledge of food sources is essential to prevent nutritional deficiencies. Understanding the nutritional values of different foods allows individuals to incorporate a balanced diet, ensuring they receive adequate vitamins, minerals, and other necessary nutrients. For example, knowing that leafy greens are rich in iron, or that dairy products provide calcium, can guide food choices for individuals with specific dietary needs. This nutritional literacy can help combat deficiencies that might lead to serious health issues, empowering individuals to make informed choices that support their overall wellbeing.