Top 7 superfoods to trySuperfoods have no agreed-upon definition, but most nutritionists would describe a superfood as a food offering superior nutrition in its class. Genuine superfoods have a high nutrient bang for their calorie buck. ... Beetroot. ... Blackcurrants. ... Cold-pressed nut oils. ... Watermelon seeds. ... Algae. ... Offal. ... Turmeric.