You may think chewing gums can only harm your teeth, but they can actually do damage to the entire organism.
Since you touch the chewing gum before you put it in your mouth, you are entering numerous bacteria.
You can damage your jaw
Chewing a gum can cause jaw damaging, toothache, headache, muscle pain and ear pain.
While you chew the gum, you are entering twice as much air in your stomach which can cause cramps, gasses as well as viruses which can cause different types of health problems.
Chewing increases appetite. This way you will reach for unnecessary calories which lead to gaining weight.