You may have heard 1000 + 1 reasons not to swallow your chewing gum, but if you did, it will not kill you, nor will it stay in your stomach for seven years…. 
The risks from chewing gum are greatly exaggerated.
The gastroenterologist Mark Larson tells Greatist that he always swallows his gum.
"I just hate the idea of taking it out and putting it somewhere," he says.
Your body does the same thing as gum, as with everything else, it can not digest like all the fibers. He just takes them out.
So where does the myth come from? Probably from a real, but rare phenomenon called the bezoar. Bezoar describes a mass of undigested τρόφιμα (or non-food) stuck in your stomach or intestine.
A cat she often gets it with her hair that she can't digest.
Although the bezoar, is a real phenomenon it is so rare there are only three cases that have been reported in the medicine bibliography.
