Why does Botox makes a person’s smile look fake?

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Why does Botox makes a person’s smile look fake?

In: Biology

when you inject poison like that into your muscles it freezes them or makes them “unable to contract” AKA work. To make a smile you need a lot of face muscles, if you cant use your muscles properly the smile might come off “fake” as you put it.

Because it’s not part of the natural make-up of the face.

Natural is almost the opposite of fake, so …