“Controlled feeding of a high protein, low residue diet for mission pilots should begin twenty-four hours prior to take-off. The objective of this controlled die is to provide foods which can be almost completely absorbed from the gastrointestinal tract, thereby leaving a minimum of residue for the formation of feces and intestinal gases.”
Brutal! I've been consuming a high protein diet for years, but I supplement with fiber to help ease that process. This would be torturous.
“This obviates the need for frequent defecation and decreases the likelihood of significant gaseous expansion in the intestinal tract.” Recommended foods included coffee, tea, rice, noodles, cottage cheese, eggs, meat, soups, sweets, and vegetables.
Foods not recommended? Milk, bread, “rich” desserts such as pies and pastries, fried foods, fatty foods, fruit, pickles, nuts, and of course, cheese.
That might explain the traditional steak and egg breakfast for astronauts. However, Marines did this before going into battle.
[Brutal! I’ve been consuming a high protein diet for years, but I supplement with fiber to help ease that process. This would be torturous.]
If the fiber gets to be too much for you, also try some “Natural Calm”. Keeps everything moving.