Your brain runs on glucose, nothing else, so blood sugar is important when it comes to an exam. You need a high background level and the ability to raise it at need.

Tonight I've made myself a high-protein, high carb. meal of rice and chilli-beans. Soon I will eat far too much of it and retire to my pit. I will have more of the same for my breakfast, only this time with brown rice.

You need slow-release. Sugar must always be dribbling into your bloodstream. So you need to eat heavily.

[I'm a Ceoliac and a vegetarian so my chilli may be a bit different from your's.]

Then there is my go-faster juice. I took two cans into my last exam, I well remember horrid feeling when I ran out. Tomorrow it's got to be four cans, just in case.

My blood must have its sugar.

If only blood sugar was the only thing that I had to worry about.