Thats just counter productive, it's like saying "here brain have a bunch of **** to slow you down" Always keep fit during exam season, 3 balanced meals a day and plenty of excercise. No snacking.
In an attempt to make my studying munching healthier, I started trying to eat packets of salad, bean sprouts, peas and carrots instead of the usual junk. If you like vegetables, it may work for you.
I am a total sucker for the McDonald's Breakfast menu..
Mmmh, usually; i'll do a few hours of work/revision, then quickly get a double sausage McMuffin meal before 10:30, and then maybe get a toasted bagel with philly too..