This is on the grounds that chewing gum can deliver poisons into your circulatory system,

Whoa! I've been used to chewing gum, though I only knew of it's side effect which is tooth damaging I didn't know of the poison it can circulate in the body. Please if I may ask, can you be specific of what kinda poison that could be?

Also this thinking of it, does it mean that the gum is made out of a kind of destructive chemical?