The document discusses functional foods and nutrition. It defines functional foods as foods that provide health benefits beyond basic nutrition, such as reducing disease risk. It provides examples of functional foods like fruits and vegetables, fortified foods where nutrients have been added, and foods formulated for special dietary needs. The document also discusses categories of functional foods, essential nutrients, calories, and units of measurement for nutrients. It emphasizes that a balanced diet and lifestyle can help prevent diseases and promote health and longevity.