I have also heard this, but I don't know how it works. Logically, I would think that eating too much or too little is equally bad, as both can serve as distractions while trying to project.

I think if you eat just before trying to project, your bodies energies are directed to digesting the food. So I presume this would make projecting harder. On the other hand being starving wont help either as your stomach will be rumbling and very distracting.

Someone once told me that if you go to bed at a regular time, you shouldnt consume food after around 6pm. So that your body can fully digest so it can just concentrate on resting when you go to sleep.

I agree with fish, I think the middle way is best.

thank you both so much for the answers!

ps. sorry guys about my english...

Hmmm. Never heard that. I wouldn't think it would make much of a difference, since the ability to project mostly just depends on concentration.
That being said, I have heard that having an upset stomach increases chances of nightmares.
-J