The US vanilla shake described here has 1 g total sugar and 0 g added sugar per serving. Zero added sugar is not the same as sugar free. This vanilla formula uses stevia.
The US bar described here uses allulose and monk fruit and contains dried cranberries. It has 4 g total sugar and less than 1 g added sugar per bar. The sugar comes from natural dried cranberries. Read the ingredient list on your pack for the exact formula; sweeteners and fiber can affect digestion differently from person to person.