Superfood is a marketing term for food claimed to confer health benefits resulting from an exceptional nutrient density. The term is not commonly used by experts, dietitians and nutrition scientists, most of whom dispute those particular foods have the health benefits claimed by their advocates. Even without scientific evidence of exceptional nutrient content, many new, exotic, and foreign fruits or ancient grains are marketed under the term – or SuperFruit or SuperGrain respectively – after being introduced or re-introduced to Western markets.
Superfoods are foods — mostly plant-based but also some fish and dairy — that are thought to be nutritionally dense and thus good for one's health. Blueberries, salmon, kale and acai are just a few examples of foods that have garnered the "superfood" label.