A food item is considered a superfood if it is nutrient-dense and offers significant health benefits. Superfoods are typically rich in vitamins, minerals, and antioxidants, which may help reduce the risk of chronic diseases and improve overall wellbeing. Common examples include blueberries, kale, and quinoa. The designation of "superfood" is not a scientific classification but rather a marketing term that highlights foods that provide exceptional health-promoting properties, encouraging consumers to incorporate these items into their diets.