Prebiotics are food for probiotics.
Multiform Prebiotic is unique in that helps support gut health by going after the bad bacteria and generating more good bacteria in the process. The Multiform recipe includes PreforPro, a cocktail of prebiotic type called bacteriophages. Each bacteriophage is specific to a certain (unhealthy) strain of bacteria from which it is also harvested. Once introduced into the body the bacteriophage targets the same strain. Specifically, the unhealthy e.coli strains.
As the unhealthy bacteria is destroyed by a bacteriophage it creates a food source for healthy bacteria, which is how the term "prebiotic" is justified.