Xylitol is a sugar alcohol that may be plant-derived or synthetic. In the plant world, xylitol naturally occurs in many fruits and vegetables.
Some studies in rats link xylitol to increased production of collagen, which may help counteract the effects of aging on your skin. (1)(2)
Xylitol also feeds the friendly bacteria in your gut, acting as a soluble fibre and improving your digestive health. (3)
More studies on humans need to be conducted but to date, things look promising.