This is one of the reasons I'm really interested in that guy who recently developed a powder that contained all he needed to live in it. So, he basically just needed to mix a drink with the powder and lived off that for a month.
It was cheap and it contained everything a human needs to live. He said after a few days he didn't even have cravings any more.
If we could get something like that to basically every person in the world, hunger would be gone in a generation.