A shelf-stable consumable composition may comprise one or more Probiotic-Mimicking Elements (PMEs) wherein the median particle size of the one or more PMEs is less than the median particle size of a probiotic from which the one or more PMEs were derived. In some embodiments, the median particle size of the one or more PMEs may be less than about 0.2 microns. In some embodiments, the PMEs may comprise at least one of peptides, fatty acids, bacteriocins, cell surface proteins, phospholipids, teichoic acids, and nucleic acids, and may be combined with one or more prebiotics, such as oligosaccharides, inulin, short-chain fructo-oligosaccharides, xylooligosaccharides, galactooligosaccharides, soyoligosaccharides, and lactulose/lactitol. Methods for preparing and using a shelf-stable consumable composition for promoting digestive health in a subject are also described.