In this context, the aim of this work is to rationally study the microencapsulation of phytosterols using a mixture of arabic gum and maltodextrin as wall materials. Particularly, the effect of the addition of two different surfactants, nonionic (Tween 20) or anionic (Sodium lauryl sulfate), on the process yield, encapsulation efficiency, phytosterols retention and product particle size is evaluated. Complementarily, important parameters of the feed formulation are analyzed: wetting of phytosterols by the wall solutions (containing the wall materials and the surfactant), viscosity of the feed suspensions and size of the particles in these feed suspensions.