Supports Gastrointestinal HealthPremiumVeganNon-GMOGluten FreeDietary SupplementGMP ManufacturingQuality AssuredIndependent TestingDiscussion: Mastica Chios is mastic gum, the resinous extract of the mastic tree (Pistacia lentiscus) grown on the Greek island of Chios. It is traditionally used in Ayurveda for gastric support.