The moisture content (Table 1) of both the spray and freeze dried microcapsules produced was lower than 4.03% (w/w), and water activity was below 0.32.The moisture content and water activity values of freeze dried WPI-P-GA and WPI-P-O-GA microcapsules were slightly higher (p < 0.05) than the corresponding values of spray dried microcapsules. On the other
hand, WPI-P-O-GA microcapsules have higher moisture content (p > 0.05) than that of WPI-P-GA microcapsules. It was reported that residual water contents of 4% (w/w) or below improved the storability and stability of powders containing probiotic bacteria L.salivarius UCC 118 and Lactobacillus paracasei NFBC 338