2min chapter

Ask the Naked Scientists cover image

Is JWST disproving the big bang theory?

Ask the Naked Scientists

CHAPTER

The Dangers of Taking Eye Drops Systemically

The reason that you can rub something on your skin or put it in your eyes but not take it systemically is quite simple. It's all about where the stuff goes and in what sort of quantity. So we can put things on our skin quite safely for example but which if we eat loads of it would cause a problem. If there are vulnerable parts of the body it can get to them and poison them. Really good example of this is your own digestive juicesyour pancreas is full of the most lethal cocktail of digestive juices -  capable of killing you in minutes.

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