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.


I dont think you can die from not pooping for 3 days. I go 3 days without pooping sometimes because my metabolism is slow as fuck.
A week or longer without pooping? Yeah might cause issues, but 3 days is fine
Same here, did it when I was younger. Day 3 was rough but it was definitely doable.
Oh you definitely can. When I was around 8 I had a sever case of constipation during summer and couldn’t poop for around 2.5 weeks. During which I had to eat primarily rolled oats and medication before being able to free the path.