Probiotic use has shown both clinically and in numerous studies to be a very safe and effective therapy for many complaints. The use of probiotics in the setting of oncology has been of concern in some quarters of medicine due to both theoretical concerns surrounding immunosuppressed patients and live organisms as well as some case reports of sepsis. This systematic review provides a reasonable summary of the data and types of studies looking at both potential positive effects on probiotic use in oncology patients as well as the potentials for harm.
Probiotics safety oncology cancer Redman MG, Ward EJ & Phillips RS. The efficacy and safety of probiotics in people with cancer: a systematic review. Annals of Oncology 25: 1919–1929, 2014