There is apparently little research on this, but Richard Rothstein et. al. report on a double-blind study showing that providing vitamin supplements to poor children directly resulted in increased test scores.
But, of course, giving poor kids vitamins in the morning (maybe yummy ones) is not only too difficult to do on a regular basis, it's not really important enough to study very carefully.
Pedagogy. Remember. It's all about pedagogy. That's what we do.
We now return to our regular programming.