I have read somewhere that it is normal to defecate about once a day. This leads me to think that it takes about 24h for food to pass through the body under normal circumstances.
Now lets say you eat some bad sushi that triggers “the runs” within an hour.
When you then defecate, is it the actual sushi that comes out or is it just the food you ate before the sushi?
Also, how fast could food theoretically go from mouth to anus?
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I am a Radiologic Technologist. We do a study where people, swallow a capsule full of little metal rings, and we take periodic abdominal x-rays. Called a Stzmark study, it measures this exact thing.
My record is seeing someone take 18 days to completely eliminate all the rings from their system.
On the other hand, I once had food poisoning (I think) so bad that I lost 22 pounds in four days). I vomited a bunch overnight, then my butt turned into a firehose, and nothing I drank was being absorbed. Literally, I could feel anything I drank work through me, followed by clear diarrhea.
During that illness, just before I went to the ER for IV fluids, I did a little experiment where I swallowed a couple of hard vitamin pills and a lot of water and Gatorade. They left my system in just under twenty minutes.
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