Old Vs. New Gum

If you chew an old piece of gum, you know how your jaw almost hurts.
But did you also know it can impact your heart and blood pressure?
The department of orthodontics at the University of Naples in Italy published a study, in the Archives of Oral Biology, that proved old gum should probably be tossed away.
The study found that when 10 healthy volunteers chewed on pieces of very hard gum at the rate of 80 chews a