Does chewing gum really contain Pig fat? Is this just a rumour or a fact? - Quora
Why does carbonated water make chewing gum hard? - Quora
Exceed® Sugarless Gum: Wintermint
Vitamin-supplemented chewing gum can increase salivary and plasma levels of a panel of vitamins in healthy human participants - J. Funct. Foods - X-MOL