Several small RCTs suggest that probiotics may help reduce the incidence and/or severity of anticancer treatment-induced toxicities, particularly diarrhea, postsurgical infections, and mucositis. Probiotics appear to be associated with few AEs, though it is important to note that the United States does not regulate the labeling of probiotics. Bloodstream infections are possible, although rare, particularly among patients who are immunocompromised.”