It seems like certain food like black rice and sweetcorn come out the same way they come in and look undigested. Are you really extracting anything from them when they look untouched?
Bonus question: is this a cure for world poverty. We could send a load of sweetcorn to Africa. They could eat, rewashthen eat again. Never hungry again
Most Helpful Guy
Things like you are describing may not be fully digested, but they provide bulk and help keep you regular as for as your bowels go.
Also, it would not be any kind of cure for poverty. If you eat something and do not digest it, you get no nutrients from it, so eating it again would provide no nutrients. The entire purpose of eating is to break down the material into amino acids. If you're not breaking it down into amino acids, and it's not providing another beneficial effect such as helping evacuate your bowels, then it's not worth eating.1