A superfood is a nutrient-rich food considered to be especially beneficial for health and well-being. Superfoods are mostly plant-based but also include some fish and dairy and are thought to be nutritionally dense and thus good for one's health.
Cancer research notes that superfoods are often promoted as having an ability to prevent or cure diseases, including cancer; they caution, that you should not rely on superfoods solely to reduce the risk of cancer. Superfoods alone cannot substitute for a generally healthy and balanced diet.
Superfoods are nutrient powerhouses that pack large doses of antioxidants, polyphenols, vitamins, and minerals. Eating them may reduce the risk of chronic disease, prolong life, and combined with a generally well-balanced diet can have tremendous health benefits.