Actually, it's formerly of people.
And how many times could you recycle it before it's too low grade and hasn't enough "protein?"
Would that open up a market for high grade poop?
I guess you would then be harvesting the poop of the upper middle class to wealthy because their poop would be more valuable if it hadn't been recycled yet.
I mean it's not like you could say that their poop didn't stink but you could definitely say that they have better poop than the poor who were consuming poop to begin with.
It would also give new meaning to that old Tommy Chong line, "That's some good sh*t, man."