Naturally Better. Sweetened with Birch Xylitol. GMO Free. No Sugar or Artificial Sweeteners. Soft Chewing Gum. May reduce the risk of tooth decay. Vegan. We sweeten Xylichew with Birch Xylitol helps slow the rate and amount of acid production in the mouth reducing the acid producing bacteria that erode tooth enamel. Imagine that, a natural sweetener that tastes great and does not promote tooth decay.