Q – Are blueberries a superfood?
A – The Oxford English dictionary defines a superfood as “A nutrient-rich food considered to be especially beneficial for health and well-being.” On that loose definition, virtually any food, which contains decent amounts of vitamins and minerals, would qualify as a superfood.
My definition would be tighter and would focus more on the fact that there are some essential substances in nutrition. Essential, in nutrition, means something that we must consume; something that we must get from our diet. I would define a superfood as a food that contains essentials fats and complete protein and substantial quantities of micronutrients (vitamins and minerals). The only foods that could meet this definition would be of animal origin: meat; fish; eggs and dairy foods.
The most nutritious food I have yet analysed is offal generally and liver particularly, as this post shows (http://www.zoeharcombe.com/2014/04/the-perfect-five-a-day/).
The nutrient profile for blueberries can be seen here (http://nutritiondata.self.com/facts/fruits-and-fruit-juices/1851/2). 100g of blueberries contain 15g of carbohydrate (10g of sugar), a trace of protein and the rest is water. Blueberries are rich in vitamin C, vitamin K and manganese, but there’s not much else in the vitamin/mineral profile to shout about. Blueberries shouldn’t really pass any definition of a superfood – sorry!