After fully reading this, I think it's excellent. When drinking this liquid meal, he is healthier and better-off financially than he was when eating "cheap" takeaway food.

So we could feed this to homeless people and starving nations. If it's cheaper than and healthier than the average person's diet, this is not madness but genius really. If we think of our bodies as biological machines, what this guy has done has discovered the cheapest, most efficient fuel for the machine.

After all, our desire for food is just an evolutionary biological trick to keep us alive. Just as sex is an evolutionary biological trick to keep the human race going. So just as some people find artificial insemination to be a quicker and more convenient way to bring a new human into the world, for some people this could be the cheaper, quicker and easier way to keep their body fueled.

Of course, sex is fun, and eating food is fun. That probably won't change. But don't kid yourself that real sex or real food is necessary for the survival of the species.