Mast Chew is an organic, sugar-free chewing gum made on the NSW south coast. The gum base is extracted from various tree species of the Pistacia genus and is also known as mastic. The resin of Pistacia trees have been extensively studied and shown to exhibit anti-microbial activity. Mast Chew combines mastic, xylitol and mint to eliminate bad breath and soothe stomach upsets. Mast Chew contains nothing artificial. No petroleum. No latex. No aspartame. No artificial colours, flavours, or additives.