YOU are a bunch of chemicals pulled all together, is there anything wrong with you? :P (You as in humans in general, not specifically you)
Also, what the others said, plus it supposedly also increases brain activity, however I'm in lazy mode atm and can't find a nice one (there are several lying around on the interwebz)
Edit: There you go
In conclusion, chewing gum appears to be of benefit to
working memory, episodic long-term memory, languagebased attention and processing speed, but not to executive
function.