Can chewing one piece of gum give you cancer?

A) We don't tend to 'eat' Chewing Gum, we generally just chew it and then dispose of it. B) Smoking affects you - seriously - no matter what else you may be doing. I don't think that the dangers you face from smoking are lessened, or increased, by chewing gum at the same time. If the gum is a Nicotine Gum, as used by people trying to quit smoking, then you are increasing the dosage of nicotine that your body is getting. Nicotine is highly poisonous.