Please don’t ask why I need this.
It would be great if the food also made me sweat less.
It has to be something I can easily find.
EDITS FOR CLARIFICATION:
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I am not planning on partaking in any illegal activities.
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I do not condone the use of illegal substances and am not planning on smuggling anything anywhere.
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I am not going on a hiking trip or mailing myself anywhere.
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I will be staying in a tent (not a small one; a huge with with air conditioning and everything). I will be traveling for five days, returning to my current location on day 3 and traveling again on the last two days. I will not poop on the first three days (hopefully).
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Clean toilets with all the expected facilities will be available to me. I am not going to poop for reasons that I wish to keep to myself.
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If it gets bad, like really bad, like a-piece-of-poop-is-literally-halfway-out-my-ass bad, I will use the toilets.
Please stop asking because I am not telling anyone the reason.
Curiosity aside:
Pooping happens when the body needs to eliminate undigested waste. Almost everything that is edible has some amount of indigestible material, but some has far less than others.
The other important factor is the stimulation of bile release. This usually happens in the presence of bitter foods: dark leafy greens, pickles and other fermented foods, ect. Fats are also known to stimulate bile release. Biles primary function actually is to break down fatty acids. Even if youve eaten mostly bio-available nutrients, if your gallbladder gets stimulated you could end up on the toilet anyway.
So if your goal is to avoid pooping for several days, your ideal diet will avoid fibrous and bitter fruits and vegetables, and avoid fatty foods.
If it were me, I would eat lean meats (chicken or venison), possibly dried into jerky, and simple fruits, or juiced vegetables and fruits. The less food you eat generally, the more you’ll avoid building up waste in your intestines.
Just a heads-up: if your succeed in your goal and don’t poop for several days, your first poop after can possibly be, erm, explosive. Your gallbladder will likely continue accumulating bile during your poop-fast, and the first thing you eat that stimulates it’s release may flood your small intestines. So plan your first meal carefully!
God speed.
I would add to this a proper enema in the beginning to start from zero. that way 3 days are easy.
source: I was bedridden for over a week in a hospital. ate. did not poop.
This advice definitely fits OP’s specifications, but definitely worth stressing that if you only eat fruits and meats for a while you’re gonna have a BAD time when you do finally poop.