Follow up to "how to eat"

Ok, so here's the story behind the saying "have a full breakfast, have an ok lunch, have a small dinner."

Our bodies have a biological clock, as you may know. It's divided up into 12 blocks, with each having one organ/meridian being most active. The reason you want to eat a big breakfast is because from 7-9 am is when your stomach is most active. I guess I could make a comparison and say, eating a big breakfast is like putting wood into a wood shredder on high. Have a look at this chart on About.com. So then it comes to explain the small/early dinner. Your stomach is not most active at that time, your kidneys are. You don't want to fill up your stomach with too much stuff.

Hope this give some more concrete information about that saying.