"The combination of a probiotic and a prebiotic increases the survival and activity of probiotics in the gut and helps to stimulate the growth of healthy bacteria locally."  
                                                                                                                         
- Nutrition and Metabolism, 2011.  
PREBIOTICS ARE, VERY SIMPLY, CARBOHYDRATES PROBIOTICS CONSUME TO SURVIVE, GROW AND FLOURISH. 

All GoLive® products contain documented, clinically-tested probiotic strains (vs. generic strains), coupled with the necessary prebiotic non-GMO sugars and prebiotic non-GMO soluble fibers to ensure consumption of probiotics in a dynamic, live and growing state.

In various GoLive® products, the addition of l-glutamine, an amino acid, vitamin D3 and other essential minerals play a key role in improving the "integrity" of the epithelial cells of the gastrointestinal tract to allow bacterial colonization.
While overly simplified, think of it as cleaning and priming a wall before painting it.