I recently read of a recent scientific study, in which children were fed blueberry syrup before an exam and were compared with control subjects. The test showed that children who took blueberry syrup before the exam had significantly higher performance than the control children.
Apparently, the flavonoids in blueberries, that are antioxidant substances, help the brain work more efficiently.
This incredible study shows the importance of healthy nutrition for children. The study was published in the journal Food and Function and the DOI for the article is 10.1039/C7FO00832E.