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Log counts of Streptococcus thermophilus showing its acid tolerance as influenced by different ingredients over an incubation period of 120 min. C = control, LG = L-glutamine (7 g/L), Q = quercetin (700 mg/L), SEB = slippery elm bark (210 mg/L), MR = marshmallow root (1340 mg/L), NAG = N-acetyl-D-glucosamine (210 mg/L), LR = licorice root (210 mg/L), MM = maitake mushrooms (42 mg/L), and ZN = zinc orotate (70 mg/L). Error bars represent SE.
