fact that astronauts would eat high protein foods to minimize their bowel movements because the human body will efficiently absorb highly bioavailable proteins and fat (e.g. from animal sources) it consumes.

To minimize their bowel movements, astronauts had a high-protein, low-residue diet — think steak and eggs and other foods that are don't make a lot of waste after they are absorbed by the body.

Wow, that is a fun fact! I had no idea. That is going into trivia night