[eli5] What actually is food poisoning and what is happening in our bodies that make them respond so violently to it?
In: Biology
Okay, so I’ll try to make this as ELI5 as I can.
Just imagine that you’ve kept a pot of water on the stove for it to boil. Now you go about doing your work, but when you come to the kitchen, you accidentally wind up touching the pot on the stove.
What happens then ? You instinctively and immediately pull your hand back. Because the heat from the pot hurt your hand. And your brain took less than a second to register this heat and realise that it’s bad and can burn you and told your hand to move away.
Similarly, some foods are bad for you (just like the boiling pot), and once your body realises they’re bad for you (which takes more time than moving your hand away from a boiling pot, because in this case, the threat is not immediate, so your brain and your gut takes some time to respond), it tries to expel the bad food out.
Now once something is in your stomach, it has only two possible ways to be expelled. Which are either pooping or puking. Which is basically what happens in “food poisoning”.
As far the “why do our bodies respond so violently to it?” part of the questions is concerned. Well, due to millions of years of evolution, your body (and almost everyone else’s) has learnt to tell the difference between good and bad stuff, and it’s so good at its job, that it even knows what bad stuff is really really bad and can harm you drastically if it stays in your body for too long.
So to prevent that from happening, your body tries to expel the “bad food” as soon as possible, which manifests as diarrhoea and vomiting.
Edit: typos
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