The pH of the probiotic supernatants varied over the course of
growth for all probiotics. The pH started to decrease after 12 h, and
reached lowest levels after 24e36 h. Strain specific data are presented
in Table 2. Therewas significant difference in the mean pH of
inhibitory and non-inhibitory probiotic supernatants at time points
48 h, 72 h and six days (all P values