Chios Gum Mastic is the resinous material obtained from the Pistacia lentiscus tree which is grown on the island of Chios in Greece.  Traditionally used as a health food in Greece, a recent study reported to the New England Journal of Medicine supports mastic's contribution to gastrointestinal health and particularly for unfriendly bacteria that reside in the stomach.*

Note: Nutricology is transitioning this product to be completely vegetarian, so while the current fresh supply is sold you may receive either veggie caps or gelatin caps. Inactive ingredients may also vary slightly from what is listed below.