While I don't think it's possible to completely eliminate the need to eat, how can one really reduce the amount to eat?
Two things that consume much of my time per day are sleeping and eating. Sleeping consumes about 8 hours of my day. However, I've heard it's possible to compensate for 4 hrs. of sleep by listening to theta waves binural freq. I think. Another I heard is, there's a mind machine that can give you an equalivalent of 8 hrs. of sleep in just 15 mins.
What about eating? Is it possible to not go without food for several days and remain a optimal mental state?