xylitol [zahy-li-tawl, zahy-li-tol] noun
A low-calorie sweetener made from naturally occurring sugar alcohol found in fruits and vegetables, such as berries and mushrooms. It is not an artificial sweetener like aspartame. Food labels will classify it as a carbohydrate and sometimes as a sugar-free sweetener.
Xylitol is considered safe for diabetics, however it is quite dangerous for dogs and can lead to liver failure or death. Symptoms such as seizures can occur when a dog ingests 100 milligrams of xylitol per kilogram of bodyweight.