Modulation of gut microbiota with probiotics has been studied in a wide range of clinical settings, in the hope of achieving health benefits in the host. Under the auspices of the Asian GI Faculty, four experts discussed the role of probiotics in clinical practice at the recent IMPACT (Improving Medical Practice through Advancement in Clinical Treatment) GP symposium in Singapore sponsored by DCH Auriga. Probiotics have been marketed for a wide range of conditions, particularly gut health.