Dairy Lo, Simplesse and Prolo 11. Prolo 11 was found to be. more eVective in improving the texture of non-fat ice cream [ 11]. Prindiville et al. [ 12] reported that Simplesse was more similar to milk fat than was Dairy Lo in its effect on sensory and textural stability of low-fat ice cream. On the other hand, inulin is widely used in functional foods throughout the world for their health-promoting and technological properties. Several commercial grades of inulin are available that have a neutral, clean flavour and are used to improve mouthfeel, stability and acceptability of low-fat foods as a low caloric texturising agent [. 13, 14 ]. The characteristics of inulin as a fat mimetic have been attributed to its ability to bind water molecules and form a particle gel network [ 15 ]. In reduced-fat yog-ice cream, the addition of inulin resulted in an increase in the viscosity. and hardness [ 16]. Schaller-Povolny and Smith [ 17 ] reported an increase in the viscosity and decrease in the freezing point of reduced-fat ice cream containing inulin and also an improvement in the sensory properties [. 18]. Little research has been reported on the functionality of inulin and WPI as a food ingredient in reduced-fat ice creams in comparison to whole ice cream. There is no study that compares the eVects of them. Thus, the objective was to compare the eVects of substitution of milk fat with inulin or WPI on the rheological characteristics of reduced-fat and low-fat ice cream.