It takes ~36 hours from the moment you bite into your meal to when you’re pooping it out. Meaning, your digestive tract has 36 hours worth of meals it’s currently digesting at any given time.
When you eat something bad, it seems that you’re on the toilet pooping it out within the hour. How is that even possible if the pathway is blocked by 36 hours worth of meals?
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That meal that ‘passes through you’ may not be the content coming out. As others have said, it doesn’t bypass your digestive system, it has to pass through like the rest of your food, or utilise the emergency system that is vomiting or completely emptying your digestive system.
Most times though, you may just be eating something that triggers your digestive system to pass what it has. When food hits your stomach, your body releases hormones that tell your colon to contract. This is called the **gastrocolic reaction**. It’s a perfectly natural reaction, and it can be mild, but for some it can be pretty strong. It’s so you can eat more food.
It’s possible some foods trigger this harder for you than others. Greasy foods are known to trigger it more intensely than other food.
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