How do babies, who drink only milk, create solid waste?

Question

Edit: To clarify, I’m asking about human babies drinking human breast milk.

In: Biology

Answer 1

NASA once made a diet that they assumed would result in no poop. They gave pure amino acids assuming that the gut would absorb and nothing left over. It smelled bad. The guys with the right stuff said this is the wrong stuff and the idea was tossed. The product is now sold as Vivonex, a tube feeding for patients with digestive problems. BTW everyone poops, no matter what diet.