3.4 In Vitro Test of Exobiopolymer as Prebiotic Another criterion of a good prebiotic is capable to promote the growth of probiotics in GI tract, which was studied in vitro for their growth stimulating on two model probiotics (L. acidophilus BCC 13839 and B. animalis ATCC 25527) compared to glucose and inulin (a commercial prebiotic). The highest growth of L. acidophilus BCC 13839 was observed on glucose after 10 h of cultivation with higher significant value of cell turbidity (Figure 1) whereas inulin supported the growth after glucose, which turbidity at 600 nm increased after 10 h of cultivation. Three different exobiopolymers including inulin showed not much difference in cell turbidity. Among the studied exobiopolymers, the