There are a lot of advantages in eating rice.
 ・Rice raises the amount of glucose in the blood slowly because it is digested slowly.
      →・Sharply raising or droping the amount of bloodsugar makes you sleepy.
 ・Your bowelmovement becomes better because rice contains a lot of indigestible things.
 ・Being digested slowly, rice make you full for a long time with the result that they play a role in weight loss.

Do you eat a well-balanced breakfast everyday?
Do you feel irritated at small things or distracted?

The energy which supports brain function is "glucose".
When you don't enough glucose, your brain becomes unenergetic.
 ・That make you irritated and distracted, or prevents you from memorizing and concentrating.

This is why you had better eat breakfast.