Chew on this

With the exception of 'natural' brands, all of the chewing gum on sale is made from
butadiene- based synthetic rubber, a polymer - a plastic product made from oil (very much
like the stuff we use to make car tyres). You probably had no idea that you were chewing on
what is essentially a lump of malleable plastic and that's not surprising, because the
manufacturers don't actually tell you as much - they kind of dodge around the detail.