[Jolla]

I would have thought they would have had them on a pretty serious diet for a couple of days before and during the mission to avoid such items

[C210N]

They do. I read about it recently. Apparently, though, it does not eliminate (no pun intended), but only minimizes.

I think it’s referred to as a “low residue” diet.

[Calvin Locke]

I think a saw an interview with Jim Lovell about an extended Gemini mission, with rendezvous.

Towards the end, can’t remember if it was Lovell, but one had go #2. It was a messy production back then, especially in an even smaller vehicle, so the bathroom humor was “We only have 36 hours more. Can’t you hold it?”

[boop]

I've read about how before launch, astronauts ate the "traditional breakfast of steak and eggs"

I thought, how nice, they wanted to treat the astronauts to a good meal.

Before they were eating powdered liquids, and freeze-dried provisions on board.

Now I realize they were trying to plug up the guys systems, so they wouldn't *need* to poop too often.