Sosa Inulin Cold 500 g This cold-soluble inulin from Sosa is a dietary fibre with prebiotic properties, gently extracted from fructose. To activate it, simply whisk it into cold liquid for about 1 minute, then let it rest in the refrigerator for 12 hours. Once hydrated, the powder creates a smooth, fat-free base that works brilliantly as a light alternative to fats in mousses, ice creams and other chilled desserts.