 Since all probiotics are not the same, the probiotic you choose can make the difference between superior results and no results. Look for an enriched formula containing these three key components for best results. Probiotics, prebiotics, and postbiotics. A worldwide leader in microbiome health for over 40 years, Dr. O'Hara's probiotics is an enriched full-spectrum probiotic system fermenting multiple strains of probiotic bacteria and nourishing prebiotics.