Mastic gum (Pistacia lentiscus) is a unique resin that comes from a tree grown in the Mediterranean. The resin called Mastic, Known in ancient medicine, Runs naturally from the live trees. It is strongly antiseptic, Bactericide, Antispasmodic, and Vulnerary. Also, it has been used in the treatment of cancer. The resin is mainly used medicinally as chewing gum since ancient times. It contains antioxidants that are said to support its therapeutic properties. Chewing mastic gum releases certain acids in the resin found to support upper digestive health and it is known to reduce halitosis (bad breath) and give your breath a fresh one. It is surprisingly easy to chew for hours, unlike most gums that urge you to spit it out after just a few minutes.