Sugar-free refers to adding xylitol sweetener to preserve the taste of sugar without adding edible sugar such as monosaccharide or disaccharide, so it can still be called "sugar".

Sugar-free food generally refers to sweet food without sucrose (sucrose, beet sugar), glucose, maltose and fructose, but sugar-free food should contain sugar alcohol (including xylitol, sorbitol, maltitol and mannitol) and other substitutes. According to GB28050-20 1 1 National Food Safety Standard General Rules for Nutrition Labeling in prepackaged foods, "sugar-free or sugar-free" means that the sugar content of solid or liquid food is not higher than 0.5g per 100g or 100ml.