The encapsulation yield is a key factor to determine the success oftheencapsulationmethodandtoevaluatetheefficiencyofthe selectedencapsulatingagents.Selectingtheappropriatecoating materialswilldecidethephysicalandchemicalpropertiesofthe resultantmicrocapsules[25].ForbothprobioticsL.acidophilus and L.casei, the EY was calculated for different formulations such as when encapsulated with only (WPI), or (FOS), and combination of (WPI + FOS). For each formulation, the EY was calculated according to Eq. (1) and expressed in Fig. 1. For the three formulations WPI, FOS, and WPI+FOS, the EYvalueswere86%,90%,and98%respectively.Itcanbeseen thatforallthreetypesofmicrospheres,therewasnosignificant reductionincellviability(p