This is not gum. Also not nicotine or caffeine. These are pouches filled with herbs that are considered to be "nootropics".

Nootropics are drugs that claim to improve your cognitive ability. Like the movie with Bradley Cooper, who takes the pills that make him a genius.

This is a bag of dried leaves that you put in your mouth, with the claim that it makes you smarter. I think it's not confirmed whether nootropics actually work.