Evaluation of the Amino Acid Composition and Content of Organic Acids of Complex Postbiotic Substances Obtained on the Basis of Metabolites of Probiotic Bacteria Lacticaseibacillus paracasei ABK and Lactobacillus helveticus H9

In this article, the probiotic strains of Lacticaseibacillus paracasei ABK and Lactobacillus helveticus H9 were cultured in reconstituted skim milk (RSM medium) MRS broth, cell biomass was removed at end fermentation order to obtain postbiotic substances. postbiotics, composition total amino acids, also content free acids organic analyzed. It shown that all RSM-based substances concentration increased. On contrary, MRS-based postbiotics mostly consumed during fermentation; however, a substantial, two-fold, decrease methionine observed obtained with L. ABK. Both showed change their profile from homofermentative broth mix-acid RSM medium. produced lactic acid investigated media lactate together acetate RSM. additionally synthesizes succinic on both media. Thus, it has been is more preferable than for obtaining enriched acids.