Figure 6: Production of SCFAs and lactic acid by L. fermentum NCIMB 5221. (a) Lactic, (b) acetic, (c) propionic, and (d) butyric acids, and (e) total SCFAs have been produced by probiotic bacteria in the conditioned cell culture medium (CM). The data values represent the mean ± SEM (n=3). ***p < 0.001 compared with L. acidophilus ATCC 314 and L. rhamnosus ATCC 53103. (f) Analysis of the correlation between cell growth inhibition by probiotic CM and the concentrations of SCFAs secreted in the CM. Plots represent the data of cell growth inhibition showed in Figure 5. The lines were obtained by linear regression analysis. The data values represent the mean ± SEM (n=3).