it’s not a medical issue but it is a mineral deficiency issue. give a kid magnesium (the right kind) and add, adhd, and a plethora of other maladies will go completely away.
Cool! What kind of magnesium and how much? (You are not a magnesium salesman, are you?)
Pursuant to your comment, I just read an article about good sources of magnesium in food. Amazing: chard, spinach, avocadoes are good sources. All of those are things my daughter has had cravings for since first grade or so. She must need it more than other people do, though, or not metabolize it as well, or something.