In this case the prebiotic therapy was psyllium.
onlinelibrary.wiley.com/doi/10.1111/j.1440-1746.2006.04535.x/abstract?deniedAccessCustomisedMessage=&userIsAuthenticated=falseBackground: Clinical trials of probiotic treatment for Crohn’s disease (CD) have yielded conflicting results. This study assessed the clinical usefulness of combined probiotic and prebiotic therapy in the treatment of active CD.
Conclusion: High-dose probiotic and prebiotic cotherapy can be safely and effectively used for the treatment of active CD.