Xylitol has a low GI value with little effect on blood sugar levels and insulin. Xylitol is a natural sweetener found in the fibres of many fruits and vegetables that are natural xylan-rich sources. Xylitol is an ideal sugar substitute, with the same sweetness as sugar but with 40% less calories with no unpleasant aftertaste. Suitable for diabetics, pre-diabetics, weight management programmes as well as anyone who simply prefers to follow a healthier lifestyle. Warnings: Xylitol can be highly toxic to dogs. Xylitol is can cause digestive side effects when excessively consumed, not unlike conventional sugar.