If eating anything would do, then better fruit and veggies. At least this way you avoid the overload of carbohydrates and sugar that can only lead to health problems.(Original post by SoulfulBoy)
Thanks for you advice. However, this need of eating only appears when I am concentrating to do something like revising. I don't think I am pleasing a psychological need, I rather think about like the result of some conditioning.
... and the ones that won't