Business Insider, bogies serves as your front-line defence against invading germs.It means when you breathe in you're also taking in bacteria and dirt which get trapped.As you carry on breathing and air hardens, this mucus is formed into a solid booger.
Now onto the bit about what happens when you eat the stuff lying around in your nose. Experts say eating your bogies is like ingesting a bacteria-ridden ball which releases a lot of harmful pathogens into your system.
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