As some functions of lactic acid bacteria (LABs) reside in cytoplasm or cell-wall components, more effects were shown by fresh than by pasteurized yoghurt. Classification algorithms are proposed based on information entropy. They use effects of living and pasteurized LABs on cytokines. Excessive number of results appear compatible with data suffering combinatorial explosion; however, after the equipartition conjecture one gets a criterion: the best classification is that in which entropy production is uniformly distributed. The classification agrees with the principal component analysis.

Keywords: Information entropy, Equipartition conjecture, Principal component analysis, Immune modulation, Lactic acid bacterium, Probiotic