Yogurt pH was not affected by the culture; however, the TA of yogurts fermented with P culture (1.39%) was greater compared with the TA of yogurts fermented with L culture (1.33%; Table 3). The TA of yogurts fermented with B culture (1.37%) was similar to the yogurts fermented with L or P culture (Table 3). During storage, yogurt pH significantly decreased from day 1 (4.42) through day 15 (4.31), and then remained constant until day 29 (4.29); whereas, yogurt TA significantly increased from day 1 (1.31%) through day 15 (1.37%), and then remained constant until day 29 (1.39%; Table 4). ManiL opez et al. (2014) reported the similar trend of decrease in pH and increase in TA during 35 days of storage in probiotic yogurt fermented with yogurt cultures and L. acidophilus, L. casei or L. reuteri. The pH of PE yogurt fermented with L culture (4.42) was highest and the pH of NS yogurt fermented with B or P culture (4.26 or 4.27, respectively) was lowest (Fig. 2A). The pH within NS or SA yogurts fermented with different cultures was similar (Fig. 2A).