The ancient Greeks used the sap of the Mastic tree as chewing gum. In pharmacies and nature shops they call Mastic Arabic Gum or Yemen Gum. Around the same time, Native Americans used the sap of the Chicle tree to chew on, but not swallow. Today, most chewing gum manufacturers use synthetic rubbers a stand-in. And most keep their exact recipes a secret! Chewing gum poses both risks and benefits to your health, including your oral health. If you are looking for a dentist in downtown Los Angeles, look no further than Doctor Kao!