Superfood is an advertising and marketing term that usually refers to foods that contain high levels of antioxidants, multiple nutrients and healthy ingredients. However, the concept is not well supported by science, and some so-called superfoods are not necessarily more nutritious than other common foods, and may even be mis-marketed and mis-priced as an IQ tax.

Some foods do, however, have been recognized as having a variety of benefits that can be part of a healthy diet. For example:

- Cranberries: rich in antioxidants and vitamin C, among others.

- Yellowtail: rich in Omega-3 fatty acids and protein, among others.

- Oats: rich in dietary fiber, protein and many vitamins and minerals, etc.

- Spinach: rich in dietary fiber, iron, folic acid and so on.

- Cauliflower: rich in vitamin C, dietary fiber and so on.

- Beans: rich in protein, dietary fiber, iron, zinc, vitamins and so on.

Overall, it is more scientific and practical to focus on the overall nutritional and balanced intake of a variety of foods, and to choose foods according to one's dietary needs and health status.