樂天 XYLITOL 賽駱駝 木糖醇 無糖 口香糖 Reference: The oral health benefits of chewing gum Health benefits of xylitol The caries preventive effect of 1-year use of low-dose xylitol chewing gum. A randomized placebo-controlled clinical trial in high-caries-risk adults Potential benefits of chewing gum for the delivery of oral therapeutics and its possible role in oral healthcare