Why is xylitol often used in chewing gum?

Xylitol is often used in chewing gum primarily for its ability to reduce cavity-causing bacteria. It serves as a natural sugar substitute that has been found to inhibit the growth of Streptococcus mutans, the bacteria most commonly associated with tooth decay. When xylitol is consumed, it creates an environment that is unfavorable for these harmful bacteria, thus lowering the risk of cavities. Additionally, xylitol promotes saliva production, which helps neutralize acids in the mouth and can further aid in oral health.

While xylitol does enhance flavor and could be considered for other purposes like moisture retention and possibly aiding in whitening through improved oral health, its main recognized benefit in preventive dentistry is its effectiveness in combatting tooth decay by targeting the specific pathogens responsible for cavity formation.